Hermes 4

Hermes 4 70B is a hybrid-mode reasoning model based on Llama-3.1-70B by Nous Research. Compared to Hermes 3, this model delivers enhanced mathematical and scientific reasoning, superior instruction following, and precise schema-adherent outputs with nuanced roleplay and creative writing capabilities.

The model supports a context length of 131k tokens.

What’s new vs Hermes 3

• Post-training corpus: Massively increased dataset size from 1M samples and 1.2B tokens to ~5M samples / ~60B tokens blended across reasoning and non-reasoning data.
• Hybrid reasoning mode with explicit <think>…</think> segments when the model decides to deliberate, and options to make your responses faster when you want.
• Reasoning that is top quality, expressive, improves math, code, STEM, logic, and even creative writing and subjective responses.
• Schema adherence & structured outputs: trained to produce valid JSON for given schemas and to repair malformed objects.
• Much easier to steer and align: extreme improvements on steerability, especially on reduced refusal rates.