OpenAI: tts-1
tts-1 is OpenAI's older hosted TTS SKU, not the live speech default. The same speech block now leads with GPT-4o mini TTS and GPT-4o TTS.
Compare tts-1-hd if you wanted the still-listed higher-priced twin, and whisper-1 if you wandered here for hosted speech-to-text instead.
Key Features
- Hosted API id:
tts-1is the billed speed-oriented OpenAI TTS row, not a local open-weight model. - Not the 2026 speech lead: GPT-4o TTS rows lead the same block.
- No invented latency: Do not paste leftover "hundreds of milliseconds" unless you re-time a first-party page.
Use Cases
- People with a tts-1 bookmark who need the catalog corrected.
- People who were about to call tts-1 the latest OpenAI voice.
Limitation: We did not synthesize a sample or time first-audio latency.
Pricing
openai.com/api/pricing on 2026-08-17.
| Piece | Price | Notes from that page |
|---|---|---|
| tts-1 | $15 / 1M characters | Still listed. Previous snapshot. |
| tts-1-hd | $30 / 1M characters | Still-listed higher-priced twin. |
| Live speech lead | Confirm GPT-4o TTS rows | GPT-4o mini TTS / GPT-4o TTS lead the speech block. |
If a leftover blog still calls tts-1 the latest TTS, treat the pricing-page order as the source.
Getting Started
- Open openai.com/api/pricing before you hard-code
tts-1. - Confirm GPT-4o TTS rows if you wanted the live hosted path.
- Confirm tts-1-hd if you wanted the still-listed HD twin.
- Do not paste an unverified latency into a deck.
Frequently Asked Questions
Is tts-1 still the OpenAI TTS default?
GPT-4o TTS rows lead speech.
Same as tts-1-hd?
No. HD is the higher-priced twin at $30 / 1M characters.
Is $15 / 1M still listed?
Yes, on 2026-08-17.
Alternatives
- tts-1-hd: Still-listed higher-priced TTS twin.
- whisper-1: Hosted STT SKU, still $0.006/min.
- GPT-5.6 Sol: Live OpenAI frontier chat if you wandered here for a current model.
Tips
- Call
tts-1a hosted SKU, not the current default voice. - Confirm GPT-4o TTS before you build a 2026 voice stack on tts-1.
- Keep $15 / 1M only as the listed character price.
Conclusion
tts-1 is still listed at $15 / 1M characters, but it is not the 2026 OpenAI TTS default. Start at openai.com/api/pricing, then decide whether a GPT-4o TTS row or tts-1-hd already covers the path you need.
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