Nous: Hermes 4 405B
Analysis Summary
Nous: Hermes 4 405B sits in the Legacy tier on our leaderboard, ranked #387 of 551 published models on overall intelligence. At $1.00 input and $3.00 output per 1M tokens, it is among the most expensive on the market. It offers a standard large context window.
Editorial notes
Nous Hermes 4 405B is a large model from NousResearch at $1/$3 with a 131K context window, but lacks benchmark data entirely; provider reputation is modest and no capability signals are available to justify a higher score.
Assessed May 5, 2026
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
Hermes 4 is a large-scale reasoning model built on Meta-Llama-3.1-405B and released by Nous Research. It introduces a hybrid reasoning mode, where the model can choose to deliberate internally with..
How does Nous: Hermes 4 405B stack up?
Compare side-by-side with other legacy models.
Model Information
| OpenRouter ID |
nousresearch/hermes-4-405b
|
| Provider | nousresearch |
| Release Date | August 26, 2025 |
| Context Length | 131,072 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $1.00 | $0.001000 |
| Output | $3.00 | $0.003000 |
Live Performance
Live endpoint metrics — refreshed every 30 minutes.
