tts-hd
tts-hd
Version: 001
OpenAILast updated October 2025

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Key capabilities

About this model

TTS-HD is a model that converts text to natural sounding speech.

Key model capabilities

  • TTS: optimized for speed.
  • TTS-HD: optimized for quality.

Use cases

See Responsible AI for additional considerations for responsible use.

Key use cases

TTS is optimized for realtime or interactive scenarios. For offline scenarios, TTS-HD provides higher quality.

Out of scope use cases

The provider has not supplied this information.

Pricing

Pricing is based on a number of factors, including deployment type and tokens used. See pricing details here.

Technical specs

The provider has not supplied this information.

Training cut-off date

The provider has not supplied this information.

Training time

The provider has not supplied this information.

Input formats

Max request data size: 4,096 chars can be converted from text to speech per API request.

Output formats

The provider has not supplied this information.

Supported languages

The provider has not supplied this information.

Sample JSON response

The provider has not supplied this information.

Model architecture

The provider has not supplied this information.

Long context

The provider has not supplied this information.

Optimizing model performance

The provider has not supplied this information.

Additional assets

The provider has not supplied this information.

Training disclosure

Training, testing and validation

The provider has not supplied this information.

Distribution

Distribution channels

The provider has not supplied this information.

More information

The provider has not supplied this information.

Responsible AI considerations

Safety techniques

The provider has not supplied this information.

Safety evaluations

The provider has not supplied this information.

Known limitations

The provider has not supplied this information.

Acceptable use

Acceptable use policy

The provider has not supplied this information.

Quality and performance evaluations

Source: OpenAI The provider has not supplied this information.

Benchmarking methodology

Source: OpenAI The provider has not supplied this information.

Public data summary

Source: OpenAI The provider has not supplied this information.
Model Specifications
Last UpdatedOctober 2025
ProviderOpenAI