Nous Research
LLM
Big
Open weights
Hermes 4 405B
445 days since Nous Research announced it ·
Hermes 4 405B is an open-weights LLM from Nous Research, announced 26 Aug 2025. Its context window is 128K tokens. It has 406B parameters.
- Input
- —
- per 1M tokens
- Cache write
- —
- per 1M tokens
- Cache read
- —
- per 1M tokens
- Output
- —
- per 1M tokens
- Context window
- 128K
- tokens
- Parameters
- 406B
- total
No price on the lab’s own pages.
- Announcement
- forum.nousresearch.com/t/nous-research-presents-hermes-4-our-latest-line-of-open-source-models/270
- Our story
- Our story
Our coverage
1 storyNous Research · Big · Hermes
open weights- Hermes 4 405B
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