GPT-5.1 Codex Max
Coding-optimized GPT model for repository edits, reviews, and agentic software work
openai/gpt-5.1-codex-max- Lab
- OpenAI
- Family
- gpt-codex
- Providers
- 10
- Context
- 400,000
- Output limit
- 128,000
- Knowledge
- 2024-09
- Release
- 2025-11-13
- Updated
- 2025-11-13
- Weights
- Closed
- Input
- Output types
- Capabilities
- tools, reasoning, structured
Providers
10| Provider | Lab | Model ID | Context | Output | Price | Reasoning | Tool Call | Structured | Temperature |
|---|---|---|---|---|---|---|---|---|---|
| Azure | OpenAI | gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| Kilo Gateway | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | - | No |
| NanoGPT | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $2.50 / $20.00 | Yes | Yes | Yes | - |
| Neon | OpenAI | gpt-5-1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| OpenAI | OpenAI | gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| OpenRouter | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| OrcaRouter | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| Poe | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $1.10 / $9.00 | Yes | Yes | - | No |
| Requesty | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $1.10 / $9.00 | Yes | Yes | Yes | Yes |
| Vercel AI Gateway | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | Yes |
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