Model detail
GPT-4o Mini TTS
An OpenAI speech-synthesis model that turns written text into natural-sounding audio using the GPT-4o Mini model family.
Model specs
- Model ID
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gpt-4o-mini-tts
- Context length
- –
- Max output
- –
- I/O modalities
- Released
- 2025-03
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API endpoints
One MixRoute gateway, OpenAI-compatible
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OpenAI-compatible
/v1/chat/completionsPOST
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Pricing
Flat rate, unit: /1M Tokens
Input
$0.6000 /1M Tokens
Completion
$0.0000 /1M Tokens
Audio input
$0.6000 /1M Tokens
Audio completion
$12.0000 /1M Tokens
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Selection summary
Quickly judge whether it fits your workload
What is this model good for?
An OpenAI speech-synthesis model that turns written text into natural-sounding audio
An OpenAI speech-synthesis model that turns written text into natural-sounding audio using the GPT-4o Mini model family.
What should you check before using it?
Confirm audio formats, sample rates, and pricing
GPT-4o Mini TTS supports streaming and the OpenAI SDK. Released 2025-03-20. It is billed at 0.60 USD per 1M tokens. Test a representative workload before production.
Why use it through MixRoute?
Swap the base URL, keep the GPT-4o Mini TTS client
MixRoute serves GPT-4o Mini TTS on the OpenAI-compatible endpoint /v1/chat/completions; point your existing client at https://api.mixroute.ai/v1 with the model ID gpt-4o-mini-tts and re-run your integration tests.
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Capabilities & compatibility
Unconfirmed capabilities stay "Unknown," no guesses
Streaming
GPT-4o Mini TTS supports streamed responses.
stream: true streams tokens incrementally, so chat UIs render as they arrive.
OpenAI SDK
Call GPT-4o Mini TTS through MixRoute's OpenAI-compatible endpoint.
base_url to https://api.mixroute.ai/v1; everything else follows the OpenAI style.
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Token cost estimator
Live estimate from this page's pricing, not an actual bill
This model has no cache-read price; caching is not counted
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FAQ
GPT-4o Mini TTS is a text-to-speech model built on GPT-4o Mini. It converts text to natural-sounding spoken audio with a maximum of 2000 input tokens.
One endpoint, a testable decision
Test this model and alternate routes with the same request format
Start from a real workload, then let quality, total cost, and failure conditions decide whether to send production traffic.