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
- 14
- 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
Providers
14| Abacus | OpenAI | gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
|---|---|---|---|---|---|---|---|---|---|
| AI/ML API | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $2.645 / $21.16 | Yes | Yes | Yes | No |
| Azure | OpenAI | gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| Azure Cognitive Services | OpenAI | gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| Eden AI | OpenAI | azure/gpt-5.1-codex-max | 272,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| Jiekou.AI | OpenAI | gpt-5.1-codex-max | 400,000 | 128,000 | $1.1875 / $9.50 | Yes | Yes | Yes | No |
| Kilo Gateway | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| NanoGPT | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $2.50 / $20.00 | Yes | Yes | Yes | No |
| Ofox | OpenAI | openai/gpt-5.1-codex-max | 256,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
| OpenCode | 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 |
| Poe | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $1.10 / $9.00 | Yes | Yes | - | No |
| Vercel AI Gateway | OpenAI | openai/gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | Yes |
| Vivgrid | OpenAI | gpt-5.1-codex-max | 400,000 | 128,000 | $1.25 / $10.00 | Yes | Yes | Yes | No |
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