OpenAI TTS API pricing
Voice as a feature of the OpenAI platform, dead-simple endpoint, ubiquitous SDKs, but thin dedicated voice tooling (no custom voices, no SLA on free tier).
No free tierBilled per 1m characters / tokens·Verified Jun 27, 2026
Free tier
None (pay-as-you-go credits)
Plans and prices
| Plan | Price | What it covers |
|---|---|---|
| tts-1 (standard) | $15 / 1M characters | Latency-optimized model; ~$0.015 per 1K characters. Per-character billing. |
| tts-1-hd | $30 / 1M characters | Higher-fidelity, quality-optimized model; ~$0.030 per 1K characters. Per-character billing. |
| gpt-4o-mini-tts | $0.60 / 1M text input tokens + $12 / 1M audio output tokens | Token-based pricing; OpenAI estimates ~$0.015 per minute of generated audio. Newest, steerable model. |
What to watch for on the bill
- No guaranteed uptime/latency SLA on the default Standard tier, 99.9% SLA only on Scale/Priority tiers
The pricing page, as we saw it
Source: https://developers.openai.com/api/docs/guides/text-to-speech. Prices change. Confirm on the vendor page before you commit.
Compare OpenAI TTS
Other Text-to-Speech APIs
ElevenLabs · Google Cloud Text-to-Speech · Amazon Polly · Azure AI Speech · Cartesia · Resemble AI