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Canonical AI event

Legacy gpt-5.1-mini identifiers restored in API with 4.66.1

Legacy GPT-5.1-mini identifiers restored in API.

22 Sept 20261 verified claims1 sources1 observations
What happened

The official source reports this update: v4.66.1. 4.66.1 (2026-09-21) Bug Fixes api: restore legacy gpt-5.1-mini identifiers ( #1053 ) ( f2cedb5 )

Why it matters

This official update documents a development concerning v4.66.1. Its practical significance depends on the scope and evidence stated by the source.

What to watch next

Read the official source update and verify its stated scope, evidence and timing before acting on it.

Connected knowledge

Entities affected by this event

Openai Javasubject
Continue this topic
agents-softwareNew API features added in version 4.67.0.22 Sept 2026agents-softwareGPT-5.1-Mini model constants removed in v4.66.0 API update.22 Sept 2026agents-softwareNew API features added in version 4.65.0.18 Sept 2026agents-softwareVersion 4.64.0 adds compaction progress events to the API.17 Sept 2026agents-softwareJava formatter lint mode corrected in version 4.63.316 Sept 2026agents-softwareGraalVM setup-graalvm dependency updated to 1.6.6 in v4.63.215 Sept 2026
Evidence trail

Sources behind the event

OpenAI Java SDK releasesv4.66.1
Editorial presentation

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