Hermes 4 70B

Hermes 4 70B is a hybrid reasoning model from Nous Research, built on Meta-Llama-3.1-70B. It introduces the same hybrid mode as the larger 405B release, allowing the model to either respond directly or generate explicit <think>...</think> reasoning traces before answering. Users can control the reasoning behaviour with the `reasoning` `enabled` boolean. Learn more in our docs This 70B variant is trained with the expanded post-training corpus (~60B tokens) emphasizing verified reasoning data, leading to improvements in mathematics, coding, STEM, logic, and structured outputs while maintaining general assistant performance. It supports JSON mode, schema adherence, function calling, and tool use, and is designed for greater steerability with reduced refusal rates.

ChatNous Research131k tokens$0.1417 / $0.436 · 1M

nousresearch/hermes-4-70b

Context
131k tokens
Completion cap
—
Tools
No
JSON
Yes
Released
2025-08-26

Call it from Geek Hub

Same OpenAI SDK. Change the base URL and the model id.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nousresearch/hermes-4-70b",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is Hermes 4 70B?
Hermes 4 70B is a hybrid reasoning model from Nous Research, built on Meta-Llama-3.1-70B. It introduces the same hybrid mode as the larger 405B release, allowing the model to either respond directly or generate explicit <think>...</think> reasoning traces before answering. Users can control the reasoning behaviour with the `reasoning` `enabled` boolean. Learn more in our docs This 70B variant is trained with the expanded post-training corpus (~60B tokens) emphasizing verified reasoning data, leading to improvements in mathematics, coding, STEM, logic, and structured outputs while maintaining general assistant performance. It supports JSON mode, schema adherence, function calling, and tool use, and is designed for greater steerability with reduced refusal rates. Hermes 4 70B runs on the Geek Hub API (OpenAI-compatible). Model id: nousresearch/hermes-4-70b.
Is Hermes 4 70B free?
No. Input is $0.1417 per 1M tokens and output is $0.436 per 1M tokens on Geek Hub (markup included).
What is the context length of Hermes 4 70B?
Hermes 4 70B has a 131k tokens context window.
Does Hermes 4 70B support tool calling and structured outputs?
Hermes 4 70B does not advertise tool calling on this endpoint. It also supports structured outputs via a JSON schema in response_format.
When was Hermes 4 70B released?
Hermes 4 70B was released on 2025-08-26.

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