gpt-5.1 (deprecated)
gpt-5.1 is a deprecated OpenAI model that shuts down in the OpenAI API on April 1, 2027.
- Lab
- OpenAI
- Release date
- Status
- Deprecated
- API model ID
- gpt-5.1
- Shutdown date
OpenAI published a deprecation notice for gpt-5.1 on October 1, 2026. The model shuts down in the OpenAI API on April 1, 2027, and OpenAI recommends gpt-6-sol as the replacement. Until shutdown, the model remains available in the OpenAI API.
- Availability
- OpenAI API until shutdown. Recommended replacement: gpt-6-sol.
- Official source
- developers.openai.com
- Last checked
Questions
When does gpt-5.1 shut down?
It shuts down in the OpenAI API on April 1, 2027.
What replaces gpt-5.1?
OpenAI recommends
gpt-6-sol as the replacement.When was gpt-5.1 deprecated?
OpenAI published the deprecation notice on October 1, 2026.
Source
Release dates, model IDs and limits come from each lab’s own announcement, changelog, documentation or deprecations page, linked on every model with the date it was last checked. How we pick and check sources: editorial standards.