OpenAIGPT-5.1Nov 12, 2025
GPT-5.1 Instant
GPT-5.1 Instant (or GPT-5.1 chat) is a warmer and more conversational version of GPT-5-chat, with improved instruction following and adaptive reasoning for deciding when to think before responding.
Context Window
128K
tokens
Max Output
16K
tokens
Released
Nov 12, 2025
Arena Rank
—
Capabilities
👁Vision
🧠Reasoning
🔧Tool Calling
⚡Prompt Caching
🖥Computer Use
🎨Image Generation
Pricing Comparison
| Router | Input / 1M | Output / 1M | Cached Input / 1M |
|---|---|---|---|
| Vercel AI | $1.25 | $10.00 | — |
Model IDs
Tags
tool-usevisionfile-inputreasoningimplicit-caching