GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...
openai/gpt-5.1GPT-5.1 is an API model from OpenAI, released on Nov 13, 2025, with a context window of 400,000 tokens, pricing of $1.25 per million input tokens and $10 per million output tokens. It accepts file, image, text input and produces text output.
At listed prices, a request with 10,000 input tokens and 1,000 output tokens costs about $0.022.
Specs are sourced from OpenRouter and were last checked on Nov 3, 2026. Always confirm current pricing and limits with the provider before production use.
GPT-5.1 supports a context window of 400,000 tokens.
GPT-5.1 is listed at $1.25 per million input tokens and $10 per million output tokens on OpenRouter.
GPT-5.1 was published on Nov 13, 2025.
GPT-5.1 accepts file, image, text input and produces text output.