Narration now uses OpenAI's newest voice model, ahead of the retirement of the previous one.
- Same voices, refreshed sound: Alloy, Ash, Ballad, Cedar, Coral, Echo, Marin, Sage, Shimmer, and Verse are still available, with Marin and Cedar recommended for the most natural delivery
- Fable, Nova, and Onyx are retired: narration you already generated with them keeps playing; new or regenerated narration uses one of the voices above