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GPT-5.1 Codex Max
gpt-codex
Coding-optimized GPT model for repository edits, reviews, and agentic software work
- Family
- gpt-codex
- Providers
- 9
- Context
- 400,000
- Output
- 128,000
- Knowledge
- 2024-09-30
- Weights
- Closed
- Input
- textimage
- Output
- text
- Release date
- 2025-11-13
- Updated
- 2025-11-13
Providers
Source: models.dev