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32 lines
902 B
Markdown
32 lines
902 B
Markdown
# Audio Speech API quick reference
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## Endpoint
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- Create speech: `POST /v1/audio/speech`
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## Default model
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- `gpt-4o-mini-tts-2025-12-15`
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## Other speech models (if requested)
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- `gpt-4o-mini-tts`
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- `tts-1`
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- `tts-1-hd`
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## Core parameters
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- `model`: speech model
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- `input`: text to synthesize (max 4096 characters)
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- `voice`: built-in voice name
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- `instructions`: optional style directions (not supported for `tts-1` or `tts-1-hd`)
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- `response_format`: `mp3`, `opus`, `aac`, `flac`, `wav`, or `pcm`
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- `speed`: 0.25 to 4.0
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## Built-in voices
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- `alloy`, `ash`, `ballad`, `cedar`, `coral`, `echo`, `fable`, `marin`, `nova`, `onyx`, `sage`, `shimmer`, `verse`
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## Output notes
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- Default format is `mp3`.
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- `pcm` is raw 24 kHz 16-bit little-endian samples (no header).
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- `wav` includes a header (better for quick playback).
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## Compliance note
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- Provide a clear disclosure that the voice is AI-generated.
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