OpenAI · Model retirement
gpt-5.1-codex-max
Stopped working
Calls to the model gpt-5.1-codex-max on OpenAI stopped working on July 23, 2026.
What to use instead of gpt-5.1-codex-max
Move to gpt-5.6-sol, recommended by OpenAI.
Facts
- API
- OpenAI
api.openai.com - Model
gpt-5.1-codex-max- Kind
- Model retirement
- Takes effect
- July 23, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
More from OpenAI
- computer-use-preview Stopped working
- computer-use-preview-2025-03-11 Stopped working
- gpt-4o-mini-search-preview Stopped working
- gpt-4o-mini-search-preview-2025-03-11 Stopped working
- gpt-4o-search-preview Stopped working
- gpt-4o-search-preview-2025-03-11 Stopped working