OpenAIGPT-5.1Nov 13, 2025
OpenAI: GPT-5.1-Codex-Mini
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
Context Window
400K
tokens
Max Output
100K
tokens
Released
Nov 13, 2025
Arena Rank
—
Capabilities
👁Vision
🧠Reasoning
🔧Tool Calling
⚡Prompt Caching
🖥Computer Use
🎨Image Generation
Supported Parameters
Include Reasoning
Show reasoning tokens
Max Tokens
Output length limit
Reasoning
Extended thinking
Response Format
JSON mode / structured output
Seed
Deterministic outputs
structured_outputs
Tool Choice
Control tool usage
Tool Calling
Function calling support
Pricing Comparison
| Router | Input / 1M | Output / 1M | Cached Input / 1M |
|---|---|---|---|
| OpenRouter | $0.25 | $2.00 | $0.02 |
| Vercel AI | $0.25 | $2.00 | — |
| Martian | $0.25 | $2.00 | $0.02 |
Model IDs
OpenRouter
openai/gpt-5.1-codex-miniTags
visionreasoningtool-calling