Hermes 4 – Llama-3.1 405B (Reasoning)
Analysis Summary
Hermes 4 Reasoning on Llama 3.1 405B is Nous Research's reasoning-oriented configuration, with strong mathematics, coding, and general knowledge results. It also shows useful terminal performance, but instruction following and long-context retention are only moderate, while the agentic result does not support unrestricted autonomy.
The model fits technical problem solving, code assistance, and analytical workloads where its reasoning configuration can justify higher token costs. It is less attractive for long documents, customer-facing content, and multi-step tool orchestration. At $1 per million input tokens and $3 per million output tokens, it should be reserved for high-value technical tasks rather than routine traffic. Pair it with a cheaper model for volume work.
Assessed September 7, 2026
Editorial notes
Hermes 4 Reasoning on Llama 3.1 405B delivers strong mathematics, coding, and general knowledge results, with moderate terminal ability. Its limited long-context and agentic reliability, plus premium pricing, restrict broader workflow use.
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DFO Verdict
Hermes 4 Reasoning on Llama 3.1 405B delivers strong mathematics, coding, and general knowledge results, with moderate terminal ability. Its limited long-context and agentic reliability, plus premium pricing, restrict broader workflow use.
Benchmark scores
Magenta = intelligence · Ink = technical/agentic · Cyan = content & long-context · Grey = community benchmarks. Data: Artificial Analysis, Hugging Face.
7.5 Intelligence Index·69.7 Math Index
How Hermes 4 – Llama-3.1 405B (Reasoning) compares
Hermes 4 – Llama-3.1 405B (Reasoning) ranks #309 of 443 AI models we track for overall intelligence. At $1.00 per million input tokens it is cheaper than 27% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on value. The pulled-in technical corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $1.00 | $0.001000 |
| Output | $3.00 | $0.003000 |
What would Hermes 4 – Llama-3.1 405B (Reasoning) cost your business?
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A website chatbot handling around 100 customer conversations a day, a few short messages each.
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We route routine calls to cheap models and save Hermes 4 – Llama-3.1 405B (Reasoning) for the hard ones. Most clients cut their estimate by 60-80%.
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Frequently asked questions about Hermes 4 – Llama-3.1 405B (Reasoning)
How much does Hermes 4 – Llama-3.1 405B (Reasoning) cost?
Hermes 4 – Llama-3.1 405B (Reasoning) costs $1.00 per million input tokens and $3.00 per million output tokens.
Who created Hermes 4 – Llama-3.1 405B (Reasoning)?
Hermes 4 – Llama-3.1 405B (Reasoning) is developed by Nous Research and was released on August 27, 2025.