Our fastest engine for high-fidelity speech synthesis, offering low-latency and cost-efficient audio generation. Gemini 2.5 Flash TTS is best for real-time assistants, high-volume narration, and conversational use cases that require fine-grained control over voice style and pacing.
function_callinghttps://us-central1-aiplatform.googleapis.com/v1beta/models/{model}:generateContenthttps://us-central1-aiplatform.googleapis.com/v1beta/models/{model}:streamGenerateContent| Input | Cached input | Output | |
|---|---|---|---|
| Standard | $0.3 | — | $2.5 |
| Priority | $0.54 | — | $4.5 |
| Flex | $0.15 | — | $1.25 |
| Model | Context | Max out | Pricing |
|---|---|---|---|
| gemini-2.5-computer-use-preview-10-2025 | 128K | 64K | — |
| gemini-live-2.5-flash-preview | — | — | — |
| gemini-2.5-flash-lite | 1.0M | 66K | $0.1$0.4 |
| gemini-2.5-flash-image-preview | — | — | $0.3$2.5 |
| gemini-2.5-flash-image | 66K | 33K | $0.3$2.5 |
| gemini-2.5-flash-lite-preview-09-2025 | 1.0M | 66K | $0.3$2.5 |
| gemini-2.5-flash-native-audio-preview-12-2025 | 131K | 8K | $0.3$2.5 |
| gemini-2.5-flash-preview-05-20 | — | — | $0.3$2.5 |
| gemini-2.5-flash-preview-09-2025 | 1.0M | 66K | $0.3$2.5 |
| gemini-2.5-flash-preview-09-25 | — | — | $0.3$2.5 |
| gemini-2.5-flash-preview-tts | 8K | 16K | $0.3$2.5 |
| gemini-2.5-flash | 1.0M | 66K | $0.3$2.5 |
| gemini-2.5-pro-preview-03-25 | — | — | $1.25$10 |
| gemini-2.5-pro-preview-05-06 | — | — | $1.25$10 |
| gemini-2.5-pro-preview-06-05 | — | — | $1.25$10 |
| gemini-2.5-pro-preview-tts | 8K | 16K | $1.25$10 |
| gemini-2.5-pro | 1.0M | 66K | $1.25$10 |
/v1/models/vertex/gemini-2.5-flash-preview-ttsOur fastest engine for high-fidelity speech synthesis, offering low-latency and cost-efficient audio generation. Gemini 2.5 Flash TTS is best for real-time assistants, high-volume narration, and conversational use cases that require fine-grained control over voice style and pacing.