OpenAI confirms a bug caused GPT-5.6 users to receive GPT-5.5-mini responses.

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OpenAI confirmed a bug caused some GPT-5.6 users to receive responses from gpt-5-5-mini, according to crypto news. ChatGPT Pro and Thinking users selected the newer model but received faster, lower-quality outputs, as the backend routed requests to gpt-5-5-mini despite frontend selections. Product lead Adam Fry stated it was a routing issue affecting 3% of requests, and the problem has since been resolved.

Dynamic Watch Beating AI News: Recently, paying users of ChatGPT noticed that despite selecting GPT-5.6 Sol Thinking or Pro, responses suddenly became faster but lower in quality. After analyzing network requests, some users discovered that the frontend requested GPT-5.6, but the server actually returned gpt-5-5-mini. Adam Fry, Head of Product for OpenAI ChatGPT, has now confirmed this was a routing bug. Approximately 3% of Pro and Thinking requests were incorrectly routed to GPT-5.5-mini; the issue has since been resolved.

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