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AI Atlas
ModelRetiredProprietary

GPT-5.1 Chat

OpenAIdevelopers.openai.com/api/docs/models/gpt-5.1-ch

GPT-5.1 model used in ChatGPT

quality72

Updated 29 min ago · first seen 11 Sept 2026

model_01M293VC57TZE3GQ520CGVX0XM

Specification

Status
retired

Source:OpenAI Platform docsT1observed 29 min agohigh

Openness
proprietary

Source:OpenAI Platform docsT1observed 29 min agohigh

API model id
gpt-5.1-chat-latest

Source:OpenAI Platform docsT1observed 29 min agohigh

Deprecation date
22 Apr 2026

Source:OpenAI Platform docsT1observed 29 min agohigh

Retirement date
23 Jul 2026

Source:OpenAI Platform docsT1observed 29 min agohigh

Retirement tentative
No

Source:OpenAI Platform docsT1observed 29 min agohigh

Each value shows its source, tier and observation time. Conflicting claims are kept side by side and flagged — never averaged. How AI Atlas records facts →

Provenance

Attributed facts

8

Source tiers

T18

Freshest observation

29 min ago

Conflicts

None