Nous: Hermes 4 405B
Review
Nous Hermes 4 405B is a large-scale model from NousResearch with no published benchmark data, limiting our ability to assess its performance; while its scale suggests potential, businesses should treat it as unverified until independent evaluations are available.
Assessment date: April 10, 2026
Our methodology takes into account a range of factors including pricing, functionality, capabilities, benchmark performance, and real-world applicability. Rankings are reviewed and updated regularly as new models are released. Issues with our rankings? Contact us
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..
Architecture
| Modality | Text → Text |
| Tokenizer | Other |
| Parameters | 405B |
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.
