OpenAI
GPT-5.1 (2025-11-13)
GPT model for general reasoning, writing, coding, and tool-assisted tasks
Model facts
- Context window
- 1M tokens
- Maximum output
- 33K tokens
- Cheapest paid input
- $1.25 per 1M tokens
- Cheapest paid output
- $10 per 1M tokens
- Open weights
- no
- Providers
- 1
Capabilities and modalities
reasoning, tool calling, structured output, text.
Observed price history
- 2026-08-24: $1.25 input / $10 output per 1M tokens
API providers
- NanoGPT — model id openai/gpt-5.1-2025-11-13; $1.25 input / $10 output per 1M tokens; provider documentation