GPT-5.1
OpenAI· released 13 Nov 2025
openai/gpt-5.1- Input / 1M tokens
- $1.25
- Output / 1M tokens
- $10
Context window400K tokens
Longest answer: 128K tokens
About
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...
Details
- Lab
- OpenAIopenrouter.ai · 3 Oct 2026
- Context
- 400Kopenrouter.ai · 3 Oct 2026
- Input price
- $1.25 / 1Mopenrouter.ai · 3 Oct 2026
- Output price
- $10 / 1Mopenrouter.ai · 3 Oct 2026
- Max output
- 128,000 tokensopenrouter.ai · 3 Oct 2026
- Inputs
- image, text, fileopenrouter.ai · 3 Oct 2026
- Open weights
- Noopenrouter.ai · 3 Oct 2026
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Sources
- openrouter.ai/openai/gpt-5.1· checked 3 Oct 2026