Model · Multimodal language model
GPT-5.1 Codex
The November 2025 GPT-5.1 agentic-coding release for long-running coding tasks, served Responses-only as the rotating gpt-5.1-codex alias with no fixed dated snapshot and retired on July 23, 2026, without downloadable model weights.
- Developer
- OpenAI
- Distribution
- Developer API
- 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-Codex line launched November 13, 2025 and served only as the rotating gpt-5.1-codex alias, whose underlying snapshot was regularly updated with no fixed dated revision; OpenAI shut the API down on July 23, 2026, naming gpt-5.6-sol the substitute. The Max line that replaced it as the Codex default, the Mini sibling, Codex application behaviors, later Codex generations, fine-tuned derivatives, and the OpenAI API platform itself are separate service, application, or model boundaries.
Risk statements
The developer publishes no risk-threshold statement for this release. Absence is not evidence of safety.
Page the reviewer checked ↗ · 2026-10-09 · Research confidence: Medium
Open in the directory → Open official model page ↗
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