Google / google/gemini-2.5-pro-preview-tts
Gemini 2.5 Pro Preview TTS - access through LLMTR
A stronger text-to-speech option when you want more natural output and tighter prompt steering. Better suited than Flash TTS for premium voice experiences.
Technical specifications
| Canonical ID | google/gemini-2.5-pro-preview-tts |
|---|---|
| Provider | |
| Context window | Not available |
| Operations | AUDIO_SPEECH |
| Modalities | text, audio |
Pricing
An 8% platform margin applies to credit top-ups; model usage prices are not separately marked up.
| Operation | Metric | Unit | Price |
|---|---|---|---|
| AUDIO_SPEECH | INPUT_TEXT | PER_1M_TOKENS | $1.00 |
| AUDIO_SPEECH | OUTPUT_AUDIO | PER_1M_TOKENS | $20.00 |
Example usage
With existing OpenAI SDK flows, change only the base URL and model identifier.
curl https://llmtr.com/v1/chat/completions -H "Authorization: Bearer llmtr-your_key" -H "Content-Type: application/json" -d '{"model":"google/gemini-2.5-pro-preview-tts","messages":[{"role":"user","content":"Hello"}]}'Guides about this model
- Two-speaker dialogue with Gemini TTS - The long-text narration article covers splitting long content into chunks with a single voice. This article covers the different setup needed when narrating a two-speaker dialogue.
- Gemini TTS: Flash or Pro? Model choice and cost comparison - The Turkish voice generation article covers a single Turkish narration flow with the Pro Preview version. This article covers which criteria to use when choosing between the Flash and Pro versions of the same family.
- Generate Turkish speech with Gemini 2.5 Pro Preview TTS - Learn the model identifier, required voice selection, and response format checks needed to turn Turkish text into a single voice recording through LLMTR.
- Gemini 2.5 Pro Preview TTS: long text, pronunciation and cost - Split narration at sentence boundaries, retain the same voice and delivery notes, validate audio formats and assess cost using actual text and audio token usage.
Related models
- Gemini 3.8 Flash google/gemini-3.8-flash
- Gemini 3.7 Flash google/gemini-3.7-flash
- Gemini 2.5 Flash google/gemini-2.5-flash
- Gemini 2.5 Flash Image google/gemini-2.5-flash-image
- Gemini 2.5 Flash-Lite google/gemini-2.5-flash-lite
- Gemini 2.5 Flash Native Audio (Live API) google/gemini-2.5-flash-native-audio-preview-12-2025
- Gemini 2.5 Flash Preview TTS google/gemini-2.5-flash-preview-tts
- Gemini 2.5 Pro google/gemini-2.5-pro