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Gemini Text-to-Speech

ai.google.dev

From $0.25/mo Free plan WebAPI
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Spec score 8.8 #23 of 233 in Text-to-speech tools

Spec sheet

What it does
The Gemini API converts text into single-speaker or multi-speaker audio.Read 11 Oct 2026 · ai.google.dev
Platforms
web,apiRead 20 Sep 2026 · ai.google.dev
Free plan
YesRead 20 Sep 2026 · ai.google.dev
Integrations
The guide documents Python and JavaScript/TypeScript SDKs, Go, and REST API usage.Read 11 Oct 2026 · ai.google.dev
API access
YesRead 20 Sep 2026 · ai.google.dev
Commercial use
YesRead 20 Sep 2026 · ai.google.dev
Custom voice limits
Stored custom voices have a maximum of 200 per project and a one-year TTL; stateless voice keys have a seven-day TTL.Read 11 Oct 2026 · ai.google.dev
Data use
For paid services, Google says prompts and responses are not used to improve its products, while they may be logged for a limited period to detect and prevent policy violations and meet legal disclosures.Read 11 Oct 2026 · ai.google.dev
Export formats
WAV,PCMRead 20 Sep 2026 · ai.google.dev
Free-tier data use
The pricing page marks free-tier TTS content as used to improve Google products and paid-tier content as not used for that purpose.Read 11 Oct 2026 · ai.google.dev
Languages
78Read 20 Sep 2026 · ai.google.dev
Languages
The models automatically detect input language; Flash TTS supports over 130 languages and Flash-Lite supports over 100.Read 11 Oct 2026 · ai.google.dev
Limits
TTS accepts text-only input and produces audio-only output; one multi-speaker request supports up to two speakers using prebuilt voices.Read 11 Oct 2026 · ai.google.dev
Model choices
Gemini 3.8 Flash TTS targets studio-grade fidelity, expressive acting, and long-form stability, while Flash-Lite targets high-throughput, low-latency, cost-efficient conversational speech.Read 11 Oct 2026 · ai.google.dev
Streaming and formats
Requests can stream audio; unary output defaults to WAV and streaming output defaults to raw 24 kHz mono 16-bit PCM, with other listed encodings including mu-law and A-law.Read 11 Oct 2026 · ai.google.dev
Style control
Structured speech metadata and inline vocal tags can guide style, accent, pace, tone, pauses, and vocal events.Read 11 Oct 2026 · ai.google.dev
Testing
Google AI Studio is provided as a place to try Gemini TTS models before building.Read 11 Oct 2026 · ai.google.dev
Use cases
The TTS API is intended for exact text recitation with fine-grained control, including podcast or audiobook generation.Read 11 Oct 2026 · ai.google.dev
Voice library
Developers can select prebuilt voices, browse an Extended Voice Library, or use designed and replicated voice IDs.Read 11 Oct 2026 · ai.google.dev

Plans and prices

Gemini 3.1 Flash TTS Preview Standard $1 a month Output priced at $20 per 1 million audio tokens · Free tier available Read 20 Sep 2026 · ai.google.dev
Gemini 3.1 Flash TTS Preview Batch $0.50 a month Output priced at $10 per 1 million audio tokens · Free tier unavailable Read 20 Sep 2026 · ai.google.dev
Gemini 2.5 Flash Preview TTS Standard $0.50 a month Output priced at $10 per 1 million audio tokens · Free tier available Read 20 Sep 2026 · ai.google.dev
Gemini 2.5 Flash Preview TTS Batch $0.25 a month Output priced at $5 per 1 million audio tokens · Free tier unavailable Read 20 Sep 2026 · ai.google.dev
Gemini 2.5 Pro Preview TTS Standard $1 a month Output priced at $20 per 1 million audio tokens · Free tier unavailable Read 20 Sep 2026 · ai.google.dev
Gemini 2.5 Pro Preview TTS Batch $0.50 a month Output priced at $10 per 1 million audio tokens · Free tier unavailable Read 20 Sep 2026 · ai.google.dev
Gemini 3.8 Flash-Lite TTS — Batch Free Paid tier per 1M tokens: $0.25 input text and $3.00 output audio through Dec 31, 2026; $0.50 input text and $6.00 output audio starting Jan 1, 2027. Batch free tier unavailable · paid output equivalent to $0.00075 per 10s audio through Dec 31, 2026 Read 11 Oct 2026 · ai.google.dev
Gemini 3.8 Flash-Lite TTS — Flex Free Paid tier per 1M tokens: $0.25 input text and $3.00 output audio through Dec 31, 2026; $0.50 input text and $6.00 output audio starting Jan 1, 2027. Free tier unavailable · paid output equivalent to $0.00075 per 10s audio through Dec 31, 2026 Read 11 Oct 2026 · ai.google.dev
Gemini 3.8 Flash-Lite TTS — Priority Free Free tier available; paid tier per 1M tokens: $0.90 input text and $10.80 output audio through Dec 31, 2026; $1.80 input text and $21.60 output audio starting Jan 1, 2027. Free of charge on free tier · paid output equivalent to $0.0027 per 10s audio through Dec 31, 2026 Read 11 Oct 2026 · ai.google.dev
Gemini 3.8 Flash-Lite TTS — Standard Free Free tier; paid tier billed per 1M tokens: $0.50 input text and $6.00 output audio through Dec 31, 2026; $1.00 input text and $12.00 output audio starting Jan 1, 2027. Free of charge on free tier · paid output equivalent to $0.0015 per 10s audio through Dec 31, 2026 · audio tokens correspond to 25 tokens per second Read 11 Oct 2026 · ai.google.dev
Gemini 3.8 Flash TTS — Batch Free Paid tier per 1M tokens: $0.25 input text and $4.50 output audio through Dec 31, 2026; $0.50 input text and $9.00 output audio starting Jan 1, 2027. Batch free tier unavailable · paid output equivalent to $0.001125 per 10s audio through Dec 31, 2026 · audio tokens correspond to 25 tokens per second Read 11 Oct 2026 · ai.google.dev
Gemini 3.8 Flash TTS — Flex Free Paid tier per 1M tokens: $0.25 input text and $4.50 output audio through Dec 31, 2026; $0.50 input text and $9.00 output audio starting Jan 1, 2027. Batch-style lower pricing · free tier unavailable · output equivalent to $0.001125 per 10s audio through Dec 31, 2026 Read 11 Oct 2026 · ai.google.dev

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