Model · Multimodal language model
GPT-5.1
The GPT-5.1 flagship line for coding and agentic work with configurable reasoning effort, exposed as the gpt-5.1 alias over the gpt-5.1-2025-11-13 snapshot through OpenAI's managed developer API and Azure Foundry, without downloadable model weights.
- Developer
- OpenAI
- Distribution
- Developer API · Third-party hosting
- Artifact licensing
- Proprietary access
- License scope
- Reviewed release artifacts and mandatory terms; not an assessment of training code or training data openness.
- Licenses
- OpenAI Services Agreement
- Boundary
- This record represents the GPT-5.1 release whose API page identifies gpt-5.1-2025-11-13 as the fixed snapshot behind the gpt-5.1 alias; the API deprecation page carries no retirement entry for this base line as of review, while its chat-latest and codex variant endpoints shut down in July and August 2026. ChatGPT, the retired 5.1 chat and codex variants, the GPT-5.1 Mini/Nano siblings, later GPT releases, fine-tuned derivatives, and the OpenAI API platform itself are separate service, application, or model boundaries.
Risk statements
“High risk” · Precautionary
As we did for GPT-5 at launch, we are continuing to treat GPT-5.1 as High risk in the Biological and Chemical domain, and continuing to apply the corresponding safeguards.
- Risk areas
- Biological or chemical
- Covers
- The model itself
Read the developer's statement ↗ · 2026-10-09 · Research confidence: Medium
OpenAI names this release against “High risk” in biological or chemical capability, as a precaution. The statement covers the model itself. This is the developer's own statement, not an Atlas risk rating.
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