Overview
Hermes 4 70B vs GPT-5.1 Chat: side-by-side summary
Hermes 4 70B and GPT-5.1 Chat are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Hermes 4 70B, from Nous Research, has a 131,072-token context window and is priced by the provider serving it on OpenRouter.
GPT-5.1 Chat, from OpenAI, has a 128,000-token context window and is priced by the provider serving it on OpenRouter.
- Context window
- Hermes 4 70B: 131,072 tokens
- GPT-5.1 Chat: 128,000 tokens
- Price
- Hermes 4 70B: Pricing varies by provider
- GPT-5.1 Chat: Pricing varies by provider
- Provided by
- Hermes 4 70B: Nous Research
- GPT-5.1 Chat: OpenAI