Is OpenAI actively making changes on gpt-4o-mini-tts-2025-12-15?
The speech generated today on 2/10 is noticeably worse than output from 1/13, even though I used the exact same snapshot.
The audio sounds much darker, almost as if an aggressive low-pass filter was applied, resulting in reduced clarity and degraded vocal tone.
For example, Shimmer and Nova now sound very similar, whereas they were clearly distinct when I generated earlier.
I had to go back to gpt-4o-mini-tts-2025-03-20.
Are there other snapshots?
Hey @tiffiana, that’s odd. To help us understand what’s happening, could you please share the time window (including time zone), numbered steps to reproduce with expected vs actual behavior, the exact error text (copy/paste) plus a sample of the audio if possible, your environment details (browser/app name and version, OS and version, and device model if mobile), and the request ID/trace ID if available.
please ping us at support@openai.com and share the above information there so we can look into this further.
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