Voice product scale

TTS-1 vs TTS-1 HD Cost

Compare OpenAI text-to-speech list prices per million characters.

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OpenAI

TTS-1

Provider: OpenAI
Modality: audio
Unit price: $15.00 / 1M characters

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OpenAI

TTS-1 HD

Provider: OpenAI
Modality: audio
Unit price: $30.00 / 1M characters

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Sample workload

Estimated spend on a shared scenario

Catalog rates updated 2026-07-31. Same inputs on both models for an apples-to-apples read.

TTS-1

1,000 units

$15,000.00

Lower cost

TTS-1 HD

1,000 units

$30,000.00

TTS-1 is cheaper at this volume.

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Approximate static list prices for planning only. Always verify against each provider’s official pricing page before production budgeting.