Hermes 4 - Llama-3.1 405B
Nous Research's flagship hybrid-reasoning post-training of Llama-3.1-405B - switchable <think> mode, ~60B-token post-training corpus.
- Publisher
- Nous Research
- Family
- Hermes
- Params
- 405B
- Context
- 131K
- Input
- Output
- License
- Llama 3 Community
- Released
- 27 Aug 2025
Cite
Notes
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Context
131K
Weights
Open
downloadable
Input
$1
/1M tok
Output
$3
/1M tok
Price & speed via Artificial Analysis · ranked across tracked models
| Reasoning effort | Index | Speed |
|---|---|---|
| Reasoning | 7.5 | 39 t/s |
| Non-reasoning | 7.4 | 42 t/s |
Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers
Reported on 9 evals across 6 domains - best 82.9% on MMLU-Pro · #52 of 340