Text-to-Speech (TTS)

Use POST /v1/audio/speech to convert text to speech

Text-to-Speech (TTS)

POST /v1/audio/speech

Convert text to natural speech, compatible with the OpenAI TTS API format.

Request Parameters

Parameter	Type	Required	Description
model	string	Yes	Model name: gpt-4o-mini-tts, tts-1, tts-1-hd
input	string	Yes	Text to convert, max 4096 characters
voice	string	Yes	Voice character
response_format	string	No	Output format: mp3 (default), opus, aac, flac, wav, pcm
speed	number	No	Speed, 0.25-4.0, default 1.0

Available Voices

Voice	Characteristics
alloy	Neutral, balanced
echo	Male, steady
fable	Male, warm
onyx	Male, deep
nova	Female, lively
shimmer	Female, soft

Request Examples

cURL

curl -X POST https://crazyrouter.com/v1/audio/speech \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "gpt-4o-mini-tts",
    "input": "Hello, welcome to the Crazyrouter API. What a beautiful day!",
    "voice": "nova",
    "response_format": "mp3",
    "speed": 1.0
  }' \
  --output speech.mp3

The response is a binary audio stream. Save it directly to a file.

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Model Comparison

Model	Quality	Latency	Description
tts-1	Standard	Low	Suitable for real-time scenarios
tts-1-hd	HD	Medium	More natural speech
gpt-4o-mini-tts	Highest	Medium	Latest model, supports more languages and emotions

gpt-4o-mini-tts supports multiple languages and automatically detects the input text language to use the corresponding pronunciation.

The response is a binary audio stream, not JSON. Use --output or stream-write to a file.