Dev reports OpenAI silently updated model behind an API version, output drifted
ClickOk5811 · reddit · 2026-08-27
A developer asks on Reddit how to reliably detect OpenAI swapping the model behind an existing API version. Their prompt ran consistently for weeks, then output shape shifted, hedging increased, and a previously respected constraint softened — with zero changes on their side.
They want to know whether any after-the-fact confirmation exists — changelogs, a version identifier in response metadata, a status page logging updates with dates — or whether pinning to a dated model snapshot is the only protection, with no way to retroactively confirm an unannounced shift on a supposedly frozen snapshot.
Related event: Developers Suspect OpenAI of Silently Tweaking API Models(2 posts)→
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