Fable 5 vs Opus 5 · 47 builds tested

Claude Fable 5 vs Claude Opus 5.

● 47 IDENTICAL BUILDS · REAL 0–10 SCORES · EVERY ONE PLAYABLE

Opus 5 costs half what Fable 5 costs. Anthropic says it's nearly as smart. So I gave both models the exact same 47 build jobs and scored every result. Here's who actually won what — and which one you should pay for.

Two glowing engine cores facing each other on marble plinths — a large violet one and a half-size coral one — with a level brass balance scale between them and a fully robed figure studying it
47identical builds
12Fable 5 wins
29Opus 5 wins
50%Opus 5's price
ONE prompt identical, word for word Fable 5 builds it $10 / $50 per M Opus 5 builds it $5 / $25 per M — half Same judge scores a real mid-play frame 0–10, no inflation
The test, in one picture: identical prompt → both models build → the same vision judge scores a real playing frame of each.
I · The Problem

The Two Flagships Problem.

Anthropic now sells you two top-end models.

Fable 5 is the expensive one. $10 in, $50 out per million tokens.

Opus 5 is the new one. Exactly half that — $5 and $25.

And the pitch on Opus 5 is "nearly all the intelligence of Fable 5, at half the cost."

So every time you fire off a job, you're guessing.

Pay double for Fable 5 in case it matters? Or save half and hope Opus 5 holds up?

Guess wrong on the cheap one and you get slop you have to redo. Guess wrong on the pricey one and you burned money for nothing.

Nobody can answer it from a benchmark table, because benchmark tables are the vendor's own homework.

So I ran both models on the same 47 real build jobs and scored every single result.

THINKING IT? "Can't I just read the official benchmarks?"

You can, and they're below — but they're Anthropic scoring Anthropic.

What's here instead is 47 identical jobs, an independent judge, and every build playable so you can overrule me.

Same prompt. Same judge. Half the price on one side.
II · How the test works, in simple words

One prompt, two models, one judge.

This runs on GoldieBench — my open leaderboard where every AI model gets the same build jobs.

Each job is one prompt: "build me a playable dragon realm", "build me a driving sandbox", and so on. One file, no follow-ups, no hand-holding.

Both models get the identical wording. Whatever comes back is what gets scored — I never touch the code.

Then every build is actually played by a script (it walks, looks around, attacks), a frame is captured mid-play, and a vision judge scores that frame 0–10 against the whole field.

That last part matters. A build that looks fine frozen on load can be dead the moment you try to play it. Scoring a real playing frame catches that.

III · Exactly how it works, step by step

The rules, so you can trust the numbers.

1. The prompt is identical. Same words to both models, including the same detailed spec for what a good game needs — enemies that chase you, working controls, lit scenes.

2. One shot each. No retries for style, no "try again". First real output is the build.

3. The build is played, not posed. A script clicks in, moves, looks around and attacks before the screenshot is taken.

4. The same judge scores both. Same rubric, same 0–10 scale used for every model on the board. 8.5+ means it would top the task.

5. Failures stay in. Broken builds keep their low score and stay on the page. Hiding wrecks would make this a brochure.

6. You can check my work. Every score below links to the actual playable build. Click it and judge for yourself.

IV · The official numbers

What Anthropic claims. Straight from them.

Before my results, here's the vendor's own case for Opus 5 — worth knowing, and worth treating as marketing until tested.

Price: $5 in / $25 out per million tokens — exactly half Fable 5's $10 / $50. A Fast mode runs about 2.5x quicker at twice the base price.

Coding: more than double Opus 4.8 on Frontier-Bench v0.1, and within 0.5% of Fable 5 on CursorBench at half the cost per task.

Reasoning: about 3x the next-best model on ARC-AGI 3. Tops OSWorld 2.0 for computer use — beating Fable 5 there at a third of the cost.

Science: +10.2 points on organic chemistry and +7.7 on protein tasks versus Opus 4.8.

Safety: lowest misaligned-behaviour score of any recent Claude, and the safety filters step in about 85% less often than they do on Fable 5.

"Opus 5 delivers nearly all the intelligence of Claude Fable 5 at half the cost."

— Anthropic, Introducing Claude Opus 5, July 24, 2026

PRICE PER MILLION TOKENS — OUTPUT Fable 5 $50 Opus 5 $25 — exactly half Input follows the same split: $10 vs $5 per million. Fast mode doubles the base for ~2.5x speed.
Every job on this page cost twice as much on the left as on the right.
Official sources ↓
the announcementIntroducing Claude Opus 5 → the docsClaude API docs → my scorecardOpus 5 on GoldieBench → my scorecardFable 5 on GoldieBench →
THINKING IT? "If it's within 0.5% on their benchmark, why did yours show a bigger gap?"

Because CursorBench measures code correctness, and my jobs measure a finished, playable, good-looking thing.

Those are different skills. A model can write correct code and still ship an ugly, empty game — which is exactly what the scores below expose.

✦
V · The verdict

The scoreboard after 47 builds.

12Fable 5 wins
29Opus 5 wins
6dead heats
8.10 / 8.29average score (Fable / Opus)
HEAD-TO-HEAD — 47 IDENTICAL BUILDS Fable 5 12 wins Opus 5 29 wins — at half the price Average score across all 47: Fable 5 8.10 · Opus 5 8.29. Scores by the same judge.
The raw tally. Fable 5 takes more — but every Opus 5 win came at half the cost per job.

So the cheaper model takes the head-to-head — 29 wins to 12, with 6 dead heats.

But the split by job type is the real finding, and it's sharp.

Games are basically a coin-flip. Across the 23 game jobs it's Opus 5 12, Fable 5 10 — and Fable 5 actually edges the average (8.16 to 7.99). If your work is games, the pricier model still earns its keep.

Everything else is a landslide. Across the 24 visual, simulation and page jobs — shaders, particle systems, orbital sims, dashboards, promos — it's Opus 5 17, Fable 5 2. Average 8.57 to 8.04.

That's the sentence worth remembering: on games it's a toss-up, on everything else Opus 5 wins outright — and it costs half as much either way.

Where Opus 5 beat Fable 5

  • Wormhole — 8.8 vs 6.5
  • Fireworks — 9.0 vs 7.2
  • Orbit — 9.0 vs 7.6
  • Landing — 8.4 vs 7.2
  • Dogfight — 8.4 vs 7.4

Where Fable 5 beat Opus 5

  • Pool — 8.0 vs 6.0
  • Arcade — 8.3 vs 6.5
  • Twilightvale — 9.0 vs 7.3
  • Neonblaster — 8.4 vs 6.8
  • Doom — 8.1 vs 6.8
WHERE OPUS 5 WON — BIG, SPRAWLING BUILDS Wormhole 6.5 8.8 Fireworks 7.2 9.0 Orbit 7.6 9.0 Landing 7.2 8.4 Dogfight 7.4 8.4 Violet = Fable 5, coral = Opus 5. Judge scores out of 10.
Open worlds, driving, flight — the cheap model took the ambitious jobs.
WHERE FABLE 5 WON — TIGHT, CRAFTED BUILDS Pool 8.0 6.0 Arcade 8.3 6.5 Twilightvale 9.0 7.3 Neonblaster 8.4 6.8 Doom 8.1 6.8 Violet = Fable 5, coral = Opus 5. Judge scores out of 10.
Arcade, dungeons, physics — polish inside a small box still belongs to the pricier model.
QUALITY PER DOLLAR — AVG SCORE ÷ OUTPUT PRICE Fable 5 16.2 Opus 5 33.1 — 2.05x the value Average judge score divided by output price. Higher = more finished quality per pound spent.
Flip it to value-per-pound and the ranking inverts — this is the number that should pick your model.

Read that as a routing rule, not a ranking: default to Opus 5 and pocket the 50%, then reach for Fable 5 on the specific game-craft jobs where it still has the edge.

THINKING IT? "Fable 5 is the pricier flagship — isn't it just the better model, end of story?"

It doesn't win more — it lost 29 of these 47 jobs to a model at half the price.

Where it does still win is a real, narrow pattern (game craft), and that's worth paying for on those jobs. Paying double on everything else is just habit.

Opus 5 takes the big worlds. Fable 5 takes the tight games.
VI · Every build, side by side

All 47 duels. Click any one and play it.

Games first, most impressive first. Left is Fable 5, right is Opus 5. The green border marks the winner, the score is the judge's, and every screenshot is a real playing frame — click it to open the actual build.

The wrecks are in here too, labelled honestly. That's the point.

01Outrun 🎮 game dead heat

Outrun — synthwave horizon driving game with pseudo-3D road.

Fable 5 build of outrun — GoldieBench ▶ play Fable 5
Fable 58.7

Gorgeous synthwave palette with banded retro sun, parallax mountains, glowing palms and neon-edged pseudo-3D road with a curving horizon and traffic — genuinely polished and on-brief; only n

Opus 5 build of outrun — GoldieBench ▶ play Opus 5
Opus 58.7

Gorgeous synthwave scene nails the brief — striped sun, glowing pink/cyan road edges, palm trees, mountains, and a real curving pseudo-3D ribbon with pickups and combat HUD (kills/hostiles).

02Voxelcraft 🎮 game Fable 5 takes it

Voxel Craft — Minecraft-style sandbox, place + break blocks, day/night cycle.

Fable 5 build of voxelcraft — GoldieBench ▶ play Fable 5
Fable 59.0 ▲

AAA rebuild is an authentic textured Minecraft: procedurally-textured grass/dirt/stone/wood blocks (not flat colors), a blocky tree, flowers and stone structures, a first-person hand with a

Opus 5 build of voxelcraft — GoldieBench ▶ play Opus 5
Opus 58.4

Strong terrain generation with varied blocks, trees, and a genuine day/night cycle (screenshot shows night phase with dimmed lighting and 3 active mobs), plus a clean HUD, hotbar, and place/

03Crypt 🎮 game Fable 5 takes it

Crypt — torch-lit dungeon crawler.

Fable 5 build of crypt — GoldieBench ▶ play Fable 5
Fable 58.8 ▲

AAA rebuild via the threejs-game-director skill transforms it into a real torch-lit crawler: warm-lit cracked-stone walls, a stone sarcophagus, a flaming torch held in first-person, scattere

Opus 5 build of crypt — GoldieBench ▶ play Opus 5
Opus 58.4

Strong torch-lit crypt with a menacing skeleton enemy front-and-center, weapon in hand, full HUD (health/stamina/torch, minimap, kills/depth/foes) and atmospheric banner — clearly a combat-r

04Skyrim 🎮 game Fable 5 takes it

Skyrim-lite — first-person open-world fantasy explorer.

Fable 5 build of skyrim — GoldieBench ▶ play Fable 5
Fable 59.0 ▲

AAA rebuild is showcase-grade: a dramatic Nordic dusk valley with layered snow-capped peaks, pine forests and ruins, a first-person sword AND studded wooden shield in real PBR wood/metal/lea

Opus 5 build of skyrim — GoldieBench ▶ play Opus 5
Opus 58.2

Strong atmospheric first-person build with polished HUD (compass, sneak/kills chips, three meters), gorgeous dusk skybox, layered snow-capped mountains, pines, winding path and convincing he

05Rpg 🎮 game Opus 5 takes it

RPG — top-down RPG with sprites, combat, inventory.

Fable 5 build of rpg — GoldieBench ▶ play Fable 5
Fable 58.4

Iterated rebuild renders a polished top-down Emberfall RPG: a checkerboard overworld with trees, a dirt path, a lake, scattered loot, a readable pixel hero and a green slime enemy with an HP

Opus 5 build of rpg — GoldieBench ▶ play Opus 5
Opus 58.7 ▲

Strong: gorgeous low-poly 3D world with a real armored player, visible sword-wielding enemies, full HUD (HP/stamina/souls, kills/threats/gold), inventory hotbar and functional minimap all re

06Neonracer 🎮 game Opus 5 takes it

Neon Racer — fullscreen neon racer with vapor-trail particle effects.

Fable 5 build of neonracer — GoldieBench ▶ play Fable 5
Fable 58.3

Renders cleanly with strong on-brief neon aesthetic — glowing pink/cyan road edges, retro grid, colorful pylons and dashes create a convincing synthwave scene. Weaknesses: the vapor trail pa

Opus 5 build of neonracer — GoldieBench ▶ play Opus 5
Opus 58.7 ▲

Gorgeous vaporwave 3D scene with glowing vapor-trail particles, neon road edges, radar with tracked threats, and rich HUD — the vapor plume behind the craft is exactly on-brief and the twin-

07Racing 🎮 game Opus 5 takes it

3D Racer — third-person racing game with a track and obstacles.

Fable 5 build of racing — GoldieBench ▶ play Fable 5
Fable 58.3

Strong, clean third-person 3D racer with proper perspective road, curbs, trees, colorful obstacles, follow-cam, HUD, lives and touch controls all rendering crisply. Solid and shippable, but

Opus 5 build of racing — GoldieBench ▶ play Opus 5
Opus 58.7 ▲

Gorgeous low-poly scene with a detailed F1 kart, banked track, barriers, cones, barrels, grandstands, trees and a live minimap plus rich HUD (velocity, surface, laps, threats). Combat/threat

08Flightsim 🎮 game Opus 5 takes it

Flight Simulator — take off, fly over terrain, full flight HUD, land on the runway.

Fable 5 build of flightsim — GoldieBench ▶ play Fable 5
Fable 58.0

One-shot: real aircraft model (wings/prop/gear) on runway w/ centerline + edge lights + tower, complete glass PFD (speed/alt tapes, pitch ladder, heading ribbon), autopilot demo rolls. Alt t

Opus 5 build of flightsim — GoldieBench ▶ play Opus 5
Opus 58.6 ▲

Gorgeous low-poly terrain with detailed aircraft, hangar, runway markings, and a complete pro-grade HUD (airspeed tape, ADI attitude ball, VS, radar alt, throttle) plus combat with hostiles/

09Parachute 🎮 game Opus 5 takes it

Parachute Drop — jump from a plane, freefall, pull the chute, steer to land in a jungle clearing.

Fable 5 build of parachute — GoldieBench ▶ play Fable 5
Fable 58.0

One-shot: spread-eagle articulated skydiver over jungle canopy + river, wind streaks, altimeter tape + vspeed HUD, auto-jump demo. Cloud sprites read flat from above. Eyeballed.

Opus 5 build of parachute — GoldieBench ▶ play Opus 5
Opus 58.6 ▲

Strong: gorgeous low-poly deployed canopy with detailed rigging lines, articulated skydiver, layered clouds/terrain and a complete HUD (altitude, descent/health bars, dist-to-target compass,

10Twilightvale 🎮 game Fable 5 takes it

Twilight Vale — 3D open-world RPG with combat, terrain, weather.

Fable 5 build of twilightvale — GoldieBench ▶ play Fable 5
Fable 59.0 ▲

AAA rebuild is showcase-grade: an authored hooded hero with a glowing trailed weapon on a moody twilight field of glowing mushrooms, floating crystals and rune-stones, live storm weather wit

Opus 5 build of twilightvale — GoldieBench ▶ play Opus 5
Opus 57.3

Polished twilight atmosphere with cohesive HUD, minimap with foe blips, weather particles, and a characterful sword-wielding hero, but the visible world is dominated by flat empty sandy terr

11Game 🎮 game Opus 5 takes it

Game — generic 'make a game' open prompt.

Fable 5 build of game — GoldieBench ▶ play Fable 5
Fable 57.8

Clean 3D neon arena renders well with polished glowing walls, floating gold orbs, red chasers, and complete mechanics (score/lives/invuln/restart), but it's a fairly familiar collect-and-dod

Opus 5 build of game — GoldieBench ▶ play Opus 5
Opus 58.4 ▲

Gorgeous low-poly alien arena with a well-modeled mech, polished sci-fi HUD, working minimap showing 5 hostiles, and full combat loop wired in (kills/waves/bolts). Strong and shippable, but

12Dragonrealm 🎮 game Opus 5 takes it

The Dragon Realm — Skyrim-style frozen open world, walk-into-the-snow, draw your sword. Julian's flagship deep-build prompt.

Fable 5 build of dragonrealm — GoldieBench ▶ play Fable 5
Fable 57.8

Clean, atmospheric frozen scene with layered mountains, snow-capped pines, standing stones and a brazier fire that reads clearly as a Skyrim-inspired vale; solid low-poly polish and full con

Opus 5 build of dragonrealm — GoldieBench ▶ play Opus 5
Opus 58.3 ▲

Gorgeous atmospheric frozen world — aurora, moon glow, snowy terrain, low-poly pines, ruins, and a well-modeled armored third-person character with sword DRAWN and full HUD (compass, health/

13Gtadrive 🎮 game Opus 5 takes it

GTA Drive — open-city driving sandbox: steal cars, outrun cops, traffic, wanted level, minimap.

Fable 5 build of gtadrive — GoldieBench ▶ play Fable 5
Fable 57.5

One-shot: sunset boulevard, glowing dusk facades, orange car w/ cabin + taillight, attract-mode drift w/ tire smoke, speedo + minimap + damage HUD. Facade emissive runs hot. Eyeballed.

Opus 5 build of gtadrive — GoldieBench ▶ play Opus 5
Opus 58.4 ▲

Gorgeous cohesive art direction — detailed low-poly car with wheels/shadow, layered cityscape, refined HUD with integrity/velocity/wanted stars and a live minimap showing cop (red) and playe

14Gtafoot 🎮 game Opus 5 takes it

GTA On-Foot — third-person city streets on foot: weapons, shooting, pedestrians, cover, wanted stars.

Fable 5 build of gtafoot — GoldieBench ▶ play Fable 5
Fable 57.5

One-shot: night city w/ dense lit windows, DINER neon, rain streaks, lamp pools, blocky humanoid player, cohesive HUD + minimap + wanted stars. Dark at street level but atmospheric. Eyeballe

Opus 5 build of gtafoot — GoldieBench ▶ play Opus 5
Opus 58.4 ▲

Gorgeous dusk city with clean third-person rig, polished HUD (health/stamina/ammo/wanted stars/minimap), fountain, benches, cop car and cover props — clearly a strong shippable build. Screen

15Dogfight 🎮 game Opus 5 takes it

Dogfight — air-combat shooter.

Fable 5 build of dogfight — GoldieBench ▶ play Fable 5
Fable 57.4

Renders cleanly with a solid 3D scene—chase-cam plane, clouds, mountains, HUD, health bar and crosshair all present and on-brief. But no enemies visible in the shot and the plane looks sligh

Opus 5 build of dogfight — GoldieBench ▶ play Opus 5
Opus 58.4 ▲

Gorgeous low-poly jet, layered HUD, radar with 4 bogeys, gradient sky and terrain with pull-up warning all render cleanly and read as a real dogfight sim; slightly short of top since the scr

16Nordiccrypt 🎮 game Opus 5 takes it

Nordic Crypt — torch-lit Nordic dungeon crawler, ancient ruin to explore, first-person.

Fable 5 build of nordiccrypt — GoldieBench ▶ play Fable 5
Fable 57.8

Strong atmospheric first-person crypt with convincing stone-block walls, warm torch glow, vignette, and clean rune-styled title; the huge foreground flame sprite reads slightly like an over-

Opus 5 build of nordiccrypt — GoldieBench ▶ play Opus 5
Opus 58.0 ▲

Strong first-person crypt crawler with a clear enemy (Crypt Shade with health bar) approaching, first-person axe viewmodel, HUD with health/vigor/kills/minimap, and a torch-lit chandelier —

17Raycaster 🎮 game Fable 5 takes it

Raycaster Maze — build a Wolfenstein-style 3D maze you can walk through.

Fable 5 build of raycaster — GoldieBench ▶ play Fable 5
Fable 58.0 ▲

Iterated rebuild renders a clean DDA raycaster maze with colored walls, correct fisheye correction, crosshair, hearts and a zap meter, plus a detailed minimap showing player heading and colo

Opus 5 build of raycaster — GoldieBench ▶ play Opus 5
Opus 57.8

Strong polished HUD, minimap, weapon model and full combat framework (12 hostiles, purge objective) plus textured walls—but the screenshot shows no visible enemies and an overly blurry/washe

18Dragonflight 🎮 game Opus 5 takes it

Dragon Flight — fly a dragon through neon rings at speed, full HUD, fire-breath, fury meter.

Fable 5 build of dragonflight — GoldieBench ▶ play Fable 5
Fable 57.4

Renders cleanly with a polished neon HUD (speed/score/rings/fury), a large glowing ring, floating decor and a green winged dragon — all brief elements present. Weak spot is the camera framin

Opus 5 build of dragonflight — GoldieBench ▶ play Opus 5
Opus 58.2 ▲

Gorgeous stylized dragon with articulated wings, spine and belly plates plus a polished full HUD (hull/fury/alt/spd/combo, rings, kills, hostiles, distance marker) — clearly shippable and co

19Neoncity 🎮 game Fable 5 takes it

Neon City — cyberpunk neon-lit city you drive through.

Fable 5 build of neoncity — GoldieBench ▶ play Fable 5
Fable 58.1 ▲

Strong on-brief cyberpunk drive: clean neon road edges, glowing buildings with colored strips, magenta hood reflection and a proper first-person perspective all render well. The near hood re

Opus 5 build of neoncity — GoldieBench ▶ play Opus 5
Opus 57.4

Strong polished HUD (hull/boost/speed/kills/hostile), a nicely modeled neon vehicle with soft shadow, and a coherent purple cyberpunk street with lane dashes and neon strips — but the scene

20Neonblaster 🎮 game Fable 5 takes it

Neon Blaster — juicy arcade space shooter, waves, bosses, power-ups, screen-shake, synth music.

Fable 5 build of neonblaster — GoldieBench ▶ play Fable 5
Fable 58.4 ▲

Screenshot shows a polished, on-brief neon shooter with glowing enemies, a firing player ship, a colorful starfield, and a clean HUD; source backs juicy features (waves, bosses, power-ups, s

Opus 5 build of neonblaster — GoldieBench ▶ play Opus 5
Opus 56.8

Strong 3D presentation with polished HUD, minimap, ship model and space environment, but the brief asked for a 2D-style JUICY ARCADE space shooter with waves/bosses/power-ups — the screensho

21Doom 🎮 game Fable 5 takes it

Doom — put monsters in the raycaster maze and let them chase you.

Fable 5 build of doom — GoldieBench ▶ play Fable 5
Fable 58.1 ▲

Iterated rebuild lands a complete DOOM-style raycaster: textured corridor walls with correct perspective, a gun and crosshair, a visible demon enemy, an HP/kills/wave HUD and a live minimap

Opus 5 build of doom — GoldieBench ▶ play Opus 5
Opus 56.8

Strong polished HUD, textured raycaster walls, weapon viewmodel, and a detailed minimap show real engine work, plus counters imply combat (01/10 kills, 09 demons left). But the screenshot sh

22Arcade 🎮 game Fable 5 takes it

Arcade — classic arcade-style game (pick: tetris, breakout, snake).

Fable 5 build of arcade — GoldieBench ▶ play Fable 5
Fable 58.3 ▲

Clean, polished neon breakout with glowing rainbow bricks, gradient paddle, twinkling starfield, particle effects, autopilot demo, multi-input controls and level progression — strong and shi

Opus 5 build of arcade — GoldieBench ▶ play Opus 5
Opus 56.5

Visually impressive 3D neon arena with polished HUD, minimap, health/boost meters, combat feedback ('HULL HIT -9'), and hostiles on radar — but the brief explicitly asked for a CLASSIC arcad

23Pool 🎮 game Fable 5 takes it

Pool — physically simulated billiards game.

Fable 5 build of pool — GoldieBench ▶ play Fable 5
Fable 58.0 ▲

Renders a clean 3D table with wood rails, six pockets, full 15-ball rack and cue ball, plus solid drag-to-aim physics and ball-ball collisions; slightly generic camera angle and the rack has

Opus 5 build of pool — GoldieBench ▶ play Opus 5
Opus 56.0

Visually rich pool hall with detailed table, pendant lamps, spectator stools, and a working minimap plus combat feedback ("WRAITH CRACKED +120", enemies visible), but this is fundamentally a

24Blackhole ✦ visual Opus 5 takes it

Black Hole — gravitational lensing visualisation.

Fable 5 build of blackhole — GoldieBench ▶ play Fable 5
Fable 58.7

Strong Interstellar-style render with a clean event-horizon shadow, tilted accretion disk wrapping over/under the black hole, visible Doppler beaming brightening one side, and a subtle lense

Opus 5 build of blackhole — GoldieBench ▶ play Opus 5
Opus 59.0 ▲

Stunning Schwarzschild ray-traced lensing with a convincing event horizon, warped accretion disk arcing over/under the shadow, Doppler beaming, and a rich lensed starfield — plus a polished,

25Pathtracer ✦ visual dead heat

Path Tracer — physically-correct ray-traced renderer.

Fable 5 build of pathtracer — GoldieBench ▶ play Fable 5
Fable 58.7

Textbook Cornell box with convincing colored-wall bleeding, a golden metal sphere with sharp reflections showing the room, and a glass sphere with proper refraction/caustics and a purple sph

Opus 5 build of pathtracer — GoldieBench ▶ play Opus 5
Opus 58.7

Strong Cornell-box render with convincing refractive glass, rough gold/aluminium metals, checkerboard floor, soft area-light shadows and visible color bleeding — a genuine progressive path t

26Synthwave ✦ visual Opus 5 takes it

Synthwave — sunset-grid synthwave loop.

Fable 5 build of synthwave — GoldieBench ▶ play Fable 5
Fable 58.6

Nails every synthwave staple — banded gradient sun, glowing perspective grid, layered mountain silhouettes, starfield and neon pylons with strong purple/pink/cyan palette and clean typograph

Opus 5 build of synthwave — GoldieBench ▶ play Opus 5
Opus 58.7 ▲

Gorgeous atmospheric synthwave with a striped banded sun, wireframe mountain ridges, receding neon poles, starfield and interactive palettes/speed — the Inferno palette here glows beautifull

27Galaxy ✦ visual Opus 5 takes it

Galaxy — particle galaxy you can swirl with your mouse.

Fable 5 build of galaxy — GoldieBench ▶ play Fable 5
Fable 58.4

Strong render with a convincing spiral disk, warm-core-to-blue-outer color gradient, glowing core, background starfield, and inertia-based swirl/zoom controls. Spiral arms read as slightly d

Opus 5 build of galaxy — GoldieBench ▶ play Opus 5
Opus 58.8 ▲

Stunning multi-arm spiral with a glowing core, gradient star coloring (gold→pink→blue), halo, and distant starfield — visually the strongest galaxy render, backed by rich swirl/orbit/zoom/su

28Aurora ✦ visual dead heat

Aurora — northern lights animation.

Fable 5 build of aurora — GoldieBench ▶ play Fable 5
Fable 58.6

Beautiful WebGL fragment shader with layered green-blue aurora ribbons, twinkling starfield, snow-rimmed mountain silhouette, and elegant title typography — genuinely convincing northern lig

Opus 5 build of aurora — GoldieBench ▶ play Opus 5
Opus 58.6

Gorgeous WebGL curtains with realistic vertical streaks, layered mountains, starfield and water reflection make this a full cinematic scene; polished palette switcher and typography plus ref

29Plasma ✦ visual Opus 5 takes it

Plasma — hypnotic full-screen plasma effect with palette switcher, click ripples.

Fable 5 build of plasma — GoldieBench ▶ play Fable 5
Fable 58.4

Gorgeous smooth full-screen plasma with rich color banding, glowing title, and clean palette/hint UI; ripples and 6 palettes are implemented in source. Very close to the top of the field but

Opus 5 build of plasma — GoldieBench ▶ play Opus 5
Opus 58.7 ▲

Stunning WebGL fragment-shader plasma with smooth flowing interference, cosine palettes, visible ripple singularity, 6 palette pills with gradient swatches, blended transitions and a 2D fall

30Boids ✦ visual Opus 5 takes it

Boids — flocking-birds emergent behaviour simulation.

Fable 5 build of boids — GoldieBench ▶ play Fable 5
Fable 58.3

Strong 3D boids sim: cone-shaped birds with cyan-magenta gradient clearly flocking within a subtle wireframe bounds box, plus attract/scatter marker and clean title UI. Docks slightly for th

Opus 5 build of boids — GoldieBench ▶ play Opus 5
Opus 58.6 ▲

Strong 3D boids sim with a visibly cohesive flock of colorful winged birds, glowing leader, bounding cage, grid floor and full parameter controls (separation/alignment/cohesion/vision/hawk)

31Fractal ✦ visual dead heat

Fractal — interactive fractal explorer (mandelbrot or julia).

Fable 5 build of fractal — GoldieBench ▶ play Fable 5
Fable 58.4

Renders a clean, high-iteration Mandelbrot with sharp filament detail and a rich red/blue gradient, plus full pan/zoom/pinch, Julia toggle, morphing constant, and autoplay zoom. Very strong

Opus 5 build of fractal — GoldieBench ▶ play Opus 5
Opus 58.4

Strong GPU-shader Julia set rendering with clean smooth boundaries, full interactive toolkit (mode toggle, auto-zoom, hue/iteration sliders, pan/zoom/pinch, tap-to-spawn Julia) and a live HU

32Reactiondiff ✦ visual dead heat

Reaction-Diffusion — Turing pattern generator.

Fable 5 build of reactiondiff — GoldieBench ▶ play Fable 5
Fable 58.4

Strong Gray-Scott implementation with a beautiful teal-gold glowing palette, clean coral maze patterns filling the screen, and solid UI with presets, drawing, and reseed; the smooth-scaled u

Opus 5 build of reactiondiff — GoldieBench ▶ play Opus 5
Opus 58.4

Strong Gray-Scott sim with glowing mitosis-style blobs, clean neon palette, full control panel (f/k, diffusion, 10 presets, palettes, brush, drift) and live 52fps readout. Visually gorgeous

33Cloth ✦ visual Opus 5 takes it

Cloth — physical cloth simulation draping over an object.

Fable 5 build of cloth — GoldieBench ▶ play Fable 5
Fable 58.3

Strong Verlet cloth with structural+shear constraints draping convincingly over the sphere, nice gradient texture and folds visible in the render; loses a touch to slight harsh specular blow

Opus 5 build of cloth — GoldieBench ▶ play Opus 5
Opus 58.4 ▲

Strong Verlet cloth showing convincing draping folds over the sphere with a colorful checkered texture, shadows, and rich controls (shapes, wind, pin, wireframe); the drape reads a touch cru

34Voxel ✦ visual Fable 5 takes it

Voxel — voxel-art landscape (Minecraft-style).

Fable 5 build of voxel — GoldieBench ▶ play Fable 5
Fable 58.5 ▲

Iterated rebuild holds its excellent standard: a gorgeous floating voxel island with grass/stone/snow biomes, trees, ponds, drifting clouds and colorful flying birds, a day/night toggle and

Opus 5 build of voxel — GoldieBench ▶ play Opus 5
Opus 58.2

Strong voxel island with lush layered trees, sand beaches, tinted water and floating clouds/birds plus polished UI and controls; weakened by the harsh flat-orange sky fill that reads as a so

35Webos ✦ visual Opus 5 takes it

Web-OS Desktop — a working desktop with windows, dock, Notes / Paint / Terminal apps.

Fable 5 build of webos — GoldieBench ▶ play Fable 5
Fable 58.0

Renders cleanly with a polished menubar, blurred glass dock with hover labels and running-app dots, and all three apps (Notes, Paint, Terminal) launched and cascading correctly with working

Opus 5 build of webos — GoldieBench ▶ play Opus 5
Opus 58.7 ▲

Stunning execution: glassmorphic windows with mac-style traffic-light controls, three live apps stacked (Notes/Paint/Terminal), functional dock, menubar clock, and a gorgeous animated Three.

36Fluid ✦ visual dead heat

Fluid — WebGL fluid simulation with swirling particles.

Fable 5 build of fluid — GoldieBench ▶ play Fable 5
Fable 58.3

Renders beautifully with elegant curl-noise flow lines and a lovely cyan-to-magenta speed-based gradient, plus autopilot vortex and clean pointer interaction. Strong and shippable, but it's

Opus 5 build of fluid — GoldieBench ▶ play Opus 5
Opus 58.3

Strong curl-noise flow with 20k additive particles forming coherent swirling filaments, clean gradient title and full control set (reset/palette/swirl, drag-to-stir). The screenshot reads sl

37Orbit ✦ visual Opus 5 takes it

Orbit — N-body gravitational simulation.

Fable 5 build of orbit — GoldieBench ▶ play Fable 5
Fable 57.6

Renders cleanly with a glowing sun, colored planets, starfield and solid 3D orbit/zoom/spawn controls plus real N-body physics with softening and substeps; however the screenshot shows no vi

Opus 5 build of orbit — GoldieBench ▶ play Opus 5
Opus 59.0 ▲

Gorgeous 3D N-body sim with a glowing central star, 167 orbiting bodies with velocity trails, merges counter (12), tilted disks and companion cluster — genuine physics with softening, subste

38Solar ✦ visual Opus 5 takes it

Solar — accurate planetary solar system.

Fable 5 build of solar — GoldieBench ▶ play Fable 5
Fable 58.0

Renders cleanly with all 8 planets, elliptical orbit rings, glowing sun, Saturn's ring, and a polished title/legend UI; log-scaled distances plus interactive orbit/zoom controls are a though

Opus 5 build of solar — GoldieBench ▶ play Opus 5
Opus 58.6 ▲

Strong 3D build: banded textured Sun with layered glow, all planets on inclined elliptical orbits, visible Earth+Moon, Saturn's rings, a convincing asteroid belt, plus real-data info panel a

39Lavalamp ✦ visual Opus 5 takes it

Lava Lamp — slow blob morph animation.

Fable 5 build of lavalamp — GoldieBench ▶ play Fable 5
Fable 57.8

Strong metaball merging with convincing rim/glow and interactive stir/hue controls, but the blobs clumped into one oversized green mass filling most of the frame rather than distinct rising

Opus 5 build of lavalamp — GoldieBench ▶ play Opus 5
Opus 58.7 ▲

Gorgeous shader metaball fluid with convincing tapered glass body, glowing gold cap and ribbed metal base, plus palette switching, heat slider and pointer interaction — clearly matches the f

40Waves ✦ visual Opus 5 takes it

Waves — animated ocean wave simulation.

Fable 5 build of waves — GoldieBench ▶ play Fable 5
Fable 57.8

Renders a convincing 3D wave field with faceted specular highlights, bobbing buoys, and orbit/ripple controls, but the blown-out white specular glare feels harsh and the sun ball reads as an

Opus 5 build of waves — GoldieBench ▶ play Opus 5
Opus 58.7 ▲

Strong: convincing Gerstner wave surface with sunset foam highlights, floating buoys that bob on the sea, and a polished sea-state control panel with presets. Weak: only 20fps and dense mesh

41Fireworks ✦ visual Opus 5 takes it

Fireworks — interactive fireworks display.

Fable 5 build of fireworks — GoldieBench ▶ play Fable 5
Fable 57.2

Clean starfield with subtle gradient and a nicely styled title, plus solid physics/palette variety in code (rings, sparks, flash), but the captured moment shows an empty sky with just one fa

Opus 5 build of fireworks — GoldieBench ▶ play Opus 5
Opus 59.0 ▲

Stunning multi-type bursts (rings, peonies, chrysanthemums, willows) over a beautifully lit skyline with reflections, moon, and stars; rich UI with auto/finale/sound controls and live stats

42Particleforge ✦ visual Opus 5 takes it

Particle Forge — sculpt swirling particle systems with mouse gravity.

Fable 5 build of particleforge — GoldieBench ▶ play Fable 5
Fable 57.6

Clean render with a glowing forge core, ringed particle formation and legible mode/hint HUD; the repel state correctly pushes particles into a crisp orbital shell. However the particles read

Opus 5 build of particleforge — GoldieBench ▶ play Opus 5
Opus 58.6 ▲

Gorgeous dense 26k-particle field with rich additive-blended color, glow sprites, and a comprehensive control panel (7 shapes, 4 gravity modes, force/pull sliders, burst/pause/auto-orbit) pl

43Matrix ✦ visual Fable 5 takes it

Matrix — Matrix-rain falling-glyphs animation.

Fable 5 build of matrix — GoldieBench ▶ play Fable 5
Fable 58.3 ▲

Clean, dense katakana rain with proper fading trails, glowing bright heads, and a polished neon MATRIX title; screenshot shows a cyan hue (default green is genre-canonical) and the effect re

Opus 5 build of matrix — GoldieBench ▶ play Opus 5
Opus 57.8

Strong glyph field with authentic katakana/mixed characters, polished HUD, palette/pulse/speed controls, and a visible shockwave ripple — but the streams look faint and static in this frame

44Terrain ✦ visual Opus 5 takes it

Terrain — procedural 3D terrain explorer.

Fable 5 build of terrain — GoldieBench ▶ play Fable 5
Fable 57.8

Renders a convincing infinite terrain with snowy peaks, sandy slopes and grassy valleys, plus solid chunked LOD, auto-fly and full drag/keyboard/pinch controls; the vivid green splotches rea

Opus 5 build of terrain — GoldieBench ▶ play Opus 5
Opus 58.3 ▲

Strong island terrain with convincing height-based color ramp, sandy shores, snow-capped ridges, translucent water and a rich HUD/control panel; weak point is the flat black tree cones that

45Aipbpromo ✦ visual Opus 5 takes it

AIPB Promo — Remotion-style cinematic motion-graphics video advert for the AI Profit Boardroom, auto-playing scenes, animated stats, end CTA.

Fable 5 build of aipbpromo — GoldieBench ▶ play Fable 5
Fable 57.5

One-shot: clean gold-on-aubergine auto-playing ad, count-up stats caught mid-animation, progress bar + scene dots, deterministic 30s loop. Eyeballed.

Opus 5 build of aipbpromo — GoldieBench ▶ play Opus 5
Opus 58.3 ▲

Gorgeous cinematic 3D wireframe icosphere backdrop with floating particles, gradient brand title, and full HUD (timeline, progress dots, controls) make this genuinely Remotion-grade; slightl

46Landing ✦ visual Opus 5 takes it

Landing Page — modern marketing landing page (one-shot).

Fable 5 build of landing — GoldieBench ▶ play Fable 5
Fable 57.2

Renders with a slick animated 3D starfield, floating shapes, and clean glassmorphic feature cards, but the screenshot captures the features section with the torus knot visually intruding ove

Opus 5 build of landing — GoldieBench ▶ play Opus 5
Opus 58.4 ▲

Strong 3D WebGL scene with floating geometry, polished glass cards, animated gradient headings and clean feature grid give it a genuine premium SaaS feel; the busy 3D blob overlapping the ce

47Wormhole ✦ visual Opus 5 takes it

Wormhole — 3D wormhole tunnel flythrough.

Fable 5 build of wormhole — GoldieBench ▶ play Fable 5
Fable 56.5

The tunnel core with depth-fading rings and colorful particles reads convincingly as a wormhole and the UI/title are clean, but the flat teal fog fills most of the frame instead of an immers

Opus 5 build of wormhole — GoldieBench ▶ play Opus 5
Opus 58.8 ▲

Stunning depth with concentric glowing rings receding to a bright core, layered wireframe mesh, colorful motes, and radiating light streaks — genuinely reads as a 3D wormhole flythrough with

VII · Old way vs new way

How to actually choose.

OLD WAY one flagship for everything
  • Default to the priciest model so you never have to think
  • Pay $10 / $50 per million on jobs a cheaper model wins outright
  • Judge models off vendor benchmark tables you can't verify
  • Never test on your own real work, so you never learn the split
  • Bill climbs with every agent step, all day
  • Assume "top tier" means top tier at everything
NEW WAY route by job — keep the 50%
  • Default everything to Opus 5 at half the price — it won 29 of 47
  • Reach for Fable 5 on the game-craft jobs where it still edges ahead
  • Decide off 47 identical head-to-heads you can click and play
  • Score real playing frames, so broken builds can't hide
  • Cut roughly half the spend on the bulk of the work
  • Keep both wired in and switch per task, not per month
VIII · Three beliefs to drop

What's actually costing you.

Wrong: "The most expensive model is the safe default."
Right: The pricier model lost 29 of these 47 jobs to one costing half as much. "Safe" is testing on your own work, not paying extra to dodge the question.
Wrong: "Benchmark scores tell me which model to use."
Right: Both models sit within 0.5% on the official coding benchmark, yet on real finished builds they split 29–12. Benchmarks measure code; your customers see the finished thing.
Wrong: "I should just pick one model and stick with it."
Right: The whole finding here is that the winner changes by job type. One model is a preference; a routing rule is a system.
Don't take my word for it

Members post their wins every day — agency owners, ecom founders, course creators, solo operators across 38 countries. Real businesses, real numbers, in their own words.

Read the 158-page wins doc →
Skip the guesswork

Get both models wired into one dashboard.

Knowing the split only pays off if switching is one click. That's what the Agent Operating System does — every model in one place, sharing one memory, so you route each job to the right brain instead of paying flagship prices for all of them.

The full Agent OS zip — Fable 5, Opus 5, GPT-5.6, Kimi K3 and Hermes in one dashboard
The routing setup — which model gets which job, already configured
The Obsidian memory layer so every model knows your business cold
Coaching calls where we set it up with you, step by step
A room of 3,900+ founders running this exact stack across 38 countries
Get the Agent OS → Inside the AI Profit Boardroom · skool.com/ai-profit-lab
Set up in an afternoon · used in 38 countries · new models added the week they ship
THINKING IT? "Doesn't running the Agent OS burn a fortune in tokens?"

No — that's the biggest myth about it. The everyday 90% runs on free local models on your own machine, free API tiers slot in as profiles, and for frontier work it drives the Claude subscription you already pay for — it plugs into your Claude Code CLI, so you're not paying twice.

Routing by job the way this page shows is itself the biggest saving. Inside the Boardroom there are full token-optimisation tutorials on top.

IX · Try it yourself

Switch between them in one line.

In Claude Code, the model is just a flag:

claude --model claude-opus-5 -p "build me a driving sandbox"
claude --model claude-fable-5 -p "build me an arcade game"

Check which account you're on:

claude auth status

And in the Agent OS, the Claude engine is one line in ~/.agentic-os/config.json:

{ "claudeModel": "claude-opus-5" }

Restart the dashboard and every Claude surface uses it. No rebuild.

THINKING IT? "I asked the model its name and it said an older Opus — did the switch even work?"

Normal, and meaningless. A model's training data predates its own launch, so it guesses an old name for itself.

Trust the flag and claude auth status, not the model's self-description.

X · What you walk away with

The recap.

You saw the real split.

47 identical builds: Opus 5 29 wins, Fable 5 12 — at half the price.

Games are a coin-flip.

12–10 across 23 game jobs, with Fable 5 edging the average.

Everything else isn't close.

17–2 across 24 visual and sim jobs, 8.57 to 8.04.

You got a routing rule.

Default to Opus 5, keep Fable 5 for game craft, halve the spend.

You can check my work.

Every build on this page is playable — one click, judge it yourself.

You saw the wrecks too.

Broken builds kept their low scores. No cherry-picking.

3,900+ founders inside AIPB
400K YouTube subscribers
38 countries · live members
163K X followers

Members post their wins every day — agency owners, ecom founders, course creators, solo operators across 38 countries. Real businesses, real numbers, in their own words.

Read the 158-page wins doc →
Your move

Stop guessing which model to pay for.

This page gives you the answer for 47 jobs. The Boardroom gives you the machine — every model wired into one dashboard with shared memory, the routing already set up, and each new release dropped in the week it ships.

Readers bookmark this and keep defaulting to the priciest model. Operators join, wire both in this week, and route by job from Monday.

Decide which one you are tonight.

Get the Agent OS → Inside the AI Profit Boardroom · skool.com/ai-profit-lab
3,900+ founders · 38 countries · 5 live calls a week · every model, pre-wired

I'll see you in the next one.

Keep exploring · more guides
The Opus 5 Command Engine + Claude Opus 5
The Quicksilver Command Center + Hermes v0.19
The Ink Machine + Inkling — run a 975B frontier model on your own key.
The Lost-Click Machine™ — the clicks you're leaking across every site.
The Apollo Voice Command Engine™ — run your Mac by talking.
How to Rank #1 with GPT-5.6 AI SEO — The AI SEO Solar System™.
GPT-5.6 vs Fable 5: Who Wins?
The 5.6 Solar System™ — Sol, Terra & Luna decoded.
The GPT Command Engine™ — GPT-5.6 inside your Agent OS.
← Browse all guides  ·  By topic: Hermes · Claude · AI SEO · Free Claude Code · Build your own