Compare Mistral Medium 3.1 from Mistral AI and GPT-5 from OpenAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
Mistral Medium 3.1 and GPT-5 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Mistral Medium 3.1, from Mistral AI, has a 131,072-token context window and is priced at $0.40/M tokens input, $2/M tokens output on OpenRouter.
GPT-5, from OpenAI, has a 400,000-token context window and is priced at $1.25/M tokens input, $10/M tokens output on OpenRouter.