Gemini TTS (Google AI)
Google's text-to-speech API, built into the Gemini model family, offering solid narration quality at a request-based (not per-character) quota.
Pros
- + Free tier is genuinely usable for small/medium channels, not just a trial
- + Quota is request-based rather than character-based, which rewards batching your script into fewer, larger requests
- + Good multilingual support and generally natural delivery
- + Straightforward API that's easy to script against
Cons
- − No built-in word-level timestamp/alignment output — you need a separate forced-alignment step (e.g. faster-whisper) to build an accurate SRT
- − Daily quota resets are tied to your specific Google Cloud/AI Studio project and can't be worked around by retrying
- − Voice selection is smaller than ElevenLabs' library
Gemini’s TTS endpoint is the quiet workhorse option: less flashy than ElevenLabs, but its request-based quota model changes the economics of high-volume production, since cost scales with the number of API calls you make, not the number of characters you send.
How it works
You send a script (ideally chunked into a handful of large requests rather than many small ones — each request, success or retry, counts against your daily quota) and get back audio. Because there’s no timestamp data in the response, an accurate SRT requires a separate alignment pass against the generated audio.
Pricing, in practice
The free tier’s daily request quota resets on a schedule tied to your Google Cloud/AI Studio project, not a universal midnight — check your own project’s dashboard rather than assuming. See our full AI voice generation cost breakdown for how this compares to per-character billing.
Who it’s for
Creators producing regular long-form content who want to keep TTS costs near zero and don’t mind an extra alignment step. Compare it directly against per-character pricing in Gemini TTS vs ElevenLabs.