Google Gemini 2.5 Pro Text-To-Speech | Premium Multi-Speaker Voice Synthesis

Gemini 2.5 Pro Text-to-Speech

Gemini 2.5 Pro Text-to-Speech is Google's advanced multi-speaker speech synthesis model that turns written dialogue into natural, expressive audio. It supports multiple speakers with distinct voices in a single generation, making it ideal for podcasts, conversations, audiobooks, and any content that needs realistic multi-voice narration.

Why Choose This?

Multi-speaker dialogue Assign different voices to different speakers and generate a natural-sounding conversation in one pass — no need to stitch separate audio clips together.
Expressive, natural voices Powered by Gemini 2.5 Pro, the voices carry natural intonation, pacing, and emotional range for lifelike results.
Multi-language support Supports a wide range of languages including Arabic (Egypt), Bangla (Bangladesh), Dutch (Netherlands), English (India), English (United States), French (France), German (Germany), Hindi (India), Indonesian (Indonesia), and more.
Flexible speaker setup Add as many speakers as your script needs, each with their own named voice. Simply write dialogue with speaker labels and the model handles the rest.

Parameters

Parameter	Required	Description
text	Yes	The script or dialogue text. Use "Speaker: line" format for multi-speaker content.
language	Yes	Language and locale for synthesis (e.g., English (United States), French (France)).
speakers	Yes	A list of speaker entries, each with a speaker name and a voice selection.

How to Use

Write your script in the text field using the "Speaker: dialogue" format (e.g., "Rose: Welcome back to Tech Talk!").
Select the language from the dropdown.
Add speakers — for each speaker in your script, add an entry with the speaker name and choose a voice.
Run — the model generates a single audio file with all speakers voiced naturally.
Download the output audio.

Pricing

$0.08 per 1,000 characters of input text.

Billing Rules

Billed by text length, rounded up to the nearest 1,000 characters
Minimum charge is $0.08 (for texts up to 1,000 characters)

Examples

Text Length	Cost
500 characters	$0.08
1,000 characters	$0.08
2,500 characters	$0.24
5,000 characters	$0.40
10,000 characters	$0.80

Best Use Cases

Podcasts & Talk Shows — Generate multi-host audio content with distinct voices for each speaker.
Audiobooks & Narration — Bring stories to life with different character voices in a single generation.
E-learning & Training — Create engaging instructional audio with conversational dialogue.
Content Localization — Produce voiceovers in multiple languages for global audiences.
Prototyping & Pre-production — Quickly audition dialogue and voice pairings before recording with real talent.

Pro Tips

Use the "Speaker: dialogue" format consistently throughout your script to ensure correct voice assignment.
Make sure each speaker name in the text exactly matches the speaker name in the speakers list.
Keep dialogue natural — the model handles pacing and intonation best with conversational writing.
For long scripts, break content into logical segments to review quality before generating the full piece.

Notes

The number of available voices may vary by language. Experiment with different voice options to find the best fit for your content.
Please ensure your content complies with Google's usage policies.

Google Gemini 2.5 Pro Text-to-Speech delivers natural multi-speaker voice synthesis with 30+ voices across 24 languages. Perfect for dialogues, conversations, and multilingual content. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

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