Expired50% confidenceFactExact time
During the transition period, OpenAI suggested that users could bring their own models, use the Codex extension, or connect to other models through an AI gateway.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
9/3/2026
First Seen
Valid until: 9/17/2026(expired)
Sources
Related Entities
Related Claims
UnverifiedBoth OpenAI and Anthropic have begun offering version pinning services, allowing users to continue using older versions before confirming compatibility.75% similarUnverifiedDevelopers use the model through the Responses API, and OpenAI itself builds the Codex application using the same API and model.74% similar
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