Openai
OpenAI: GPT-5.1-Codex-Max
openai/gpt-5.1-codex-max
Input / M
Output / M
Context
Max Output
128K
Usage
Unranked
Quality
Unscored
Providers
2
Best Uptime 30m
Unavailable
Released
Dec 4, 2025
Modalities
text, image
About
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
Capabilities
Vision
Tools
Reasoning
Streaming
JSON Mode
Providers · 2
Per-provider pricing, uptime
| Provider | Input/M | Output/M | Context | Max Out | Quant | Uptime 30m |
|---|---|---|---|---|---|---|
| OpenAIRecommended OpenAI | openai/gpt-5.1-codex-max-20251204 | $1.25 | $10.00 | 400K | 128K | unknown | — |
| Azure Azure | openai/gpt-5.1-codex-max-20251204 | $1.25 | $10.00 | 400K | 128K | unknown | — |
Performance History
3 snapshots
Price History
0 recorded changes
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First seen 3d ago · Last verified 2m ago