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The Best LLMs For Hermes Agent (A Routing Guide, Not A List)
Asking "which LLM is best for Hermes" is like asking which gear is best for a car.
Hermes is model-agnostic by design — the winning answer is a routing: a main brain, a free sub-agent, and a fallback.
Here's the stack we run daily in the Agent OS.
Main brain — planning and hard reasoning
Use the strongest model you already pay for.
Claude (via the CLI on your subscription) and GPT-5.6 are the reference planners; GLM 5.2's coding plan is the budget pick that still holds up agentically.
This brain sees the complex, multi-step 10% of your workload.
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Sub-agent — the free 90%
Local via Ollama: Gemma 4 12B on modest hardware, Agents-A1 on a 32GB+ Mac (agent-tuned, .95 tok/s — benchmarked with playable demos on GoldieBench).
This brain absorbs summaries, drafts, file ops, scheduled chores — at $0.
Fallback — because models go down
Every frontier model has bad days; we've watched each one 404 at some point.
Keep one switch-away alternative configured (GLM, a free router profile, or the local model as last resort).
In Hermes, profiles make the swap one line — the system survives any single vendor.
The mindset: system over models
New model drops weekly.
If your setup is a routing rather than a loyalty, you swap a config line and keep moving.
That's the entire philosophy behind the Agent OS — and why guides here cover models as plug-ins: Agents-A1, Qwythos 9B, free OmniRoute routing.
FAQ
Which LLM should be Hermes's main model?
The best one you already pay for — Claude via its CLI or GPT-5.6. If you're cost-sensitive, GLM 5.2's coding plan is the strongest budget planner we've used.
What's the best free LLM for Hermes sub-agents?
Locally, Agents-A1 (32GB+ Macs) or Gemma 4 12B (16GB). Via free APIs, Gemma's larger variants on OpenRouter. All benchmarked on GoldieBench with real demos.
How many models should I configure?
Three roles: main, sub-agent, fallback. More than that is tool-hopping; fewer means one outage stops your agent.
Do I need APIs for all this?
No — subscription CLIs cover the main brain, Ollama covers the sub-agent, and free router tiers cover the fallback. A full Hermes stack can run with zero metered API spend.
About Julian
I'm Julian Goldie — AI entrepreneur, SEO expert, and founder of the AI Profit Boardroom (4,000+ members).
I help business owners scale with AI agents, automation, and SEO.
400K+ YouTube subscribers. 7-figure AI agency (Goldie Agency). Daily training inside the Boardroom.
Related reading
→ Best Local Model For Hermes Agent
→ Best Free Ai Model For Hermes Agent
🌐 Sister-site take: read this on GoldieBench — with the benchmark data.
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