GPT-5.1
OpenAI · Sharper GPT-5 generation for coding, product work, and tool-assisted tasks
Key facts
- Provider
- OpenAI
- Context window
- 400K tokens
- Max output
- 128K tokens
- Input price
- $1.25 / M tok
- Output price
- $10 / M tok
- Knowledge cutoff
- Sep 30, 2024
- Released
- Nov 13, 2025
- License
- —
Capabilities
ReasoningTool callingStructured outputFile attachmentsTemperature controlOpen weights
Reasoning options
- effort none · low · medium · high
Pricing
USD per million tokens, list API rates.
- Input
- $1.25
- Output
- $10
- Cache read
- $0.125
- Cache write
- —
Modalities
- Input
- Text, Image
- Output
- Text