What's free
App Free plan: 8,000 credits/month (~7 min, up to 500 characters per generation). API: the s2.1-pro-free TTS model is $0 through 2026-11-30 under fair-use limits (pay-as-you-go API, no subscription)
- Credit card
- not required
- Phone verification
- not confirmed
- Commercial use
- evaluation only
Free limits
Numeric limits are not recorded in structured form for this provider.
In the provider's words
API: 5 concurrent requests (Starter tier, <$100 paid); s2.1-pro-free under unpublished fair-use limits. App Free plan: 500 characters per generation, 8,000 credits/month
The catch
Free app plan is personal, non-commercial only (commercial use requires Premium). The $0 API model s2.1-pro-free is pitched for testing, prototyping and smaller businesses but has no TTFA/DPA guarantees. No credit card required for the Free plan.
Free models: not listed yet.
Get started
This is a first-party API, not OpenAI-compatible, so there is no drop-in base URL. The endpoint, the key and a working example are in the official docs.
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Change history
How this free tier has changed since we started tracking it (2026-07-31) — generated from the git history of providers.json.
- 2026-10-08 Updated free tier, rate limits, the catch
- 2026-07-31 Added to the hub