Gemini 3.1 Flash TTS Preview
Latest controllable speech synthesis with expressive audio tags; audio bills at 25 tokens per second, so $20/1M output is roughly $0.0005 per second — 2x the price of 2.5 Flash TTS for better naturalness and multilinguality.
Data checked 2026-09-06
Google DeepMind
preview
gemini-3.1-flash-tts-preview
- Context window
- 8.2K tokens in
- Max output
- 16.4K tokens out
- Input
- $1.00 per 1M tokens
- Output
- $20.00 per 1M tokens
- Blended
- $5.75 3:1 in:out
- Released
- 2026-04
- Licence
- proprietary
A What it is for
At a three-to-one input-to-output ratio, Gemini 3.1 Flash TTS Preview costs $5.75 per million tokens blended. A workload of one million input and 330,000 output tokens per day would run about $228.00 per month at list price, before caching or batch discounts.
B Capabilities
| Input modalities | text |
|---|---|
| Output modalities | audio |
| Batch discount | 50% off asynchronous requests |
C Others from Google DeepMind
| Model | Context | Max out | In $/M | Out $/M | Blended | Status |
|---|---|---|---|---|---|---|
Gemini 3.8 Flash
gemini-3.8-flash
|
1M | 65.5K | $0.75 | $3.75 | $1.50 | ga |
Gemini 3.7 Flash
gemini-3.7-flash
|
1M | 65.5K | $0.75 | $3.75 | $1.50 | ga |
Gemini 3.6 Flash
gemini-3.6-flash
|
1M | 65.5K | $0.75 | $3.75 | $1.50 | ga |
Gemini 3.5 Flash
gemini-3.5-flash
|
1M | 65.5K | $1.50 | $9.00 | $3.38 | ga |
Gemini 3.5 Flash-Lite
gemini-3.5-flash-lite
|
1M | 65.5K | $0.30 | $2.50 | $0.85 | ga |
Gemini 3.1 Flash-Lite
gemini-3.1-flash-lite
|
1M | 65.5K | $0.25 | $1.50 | $0.56 | ga |
Gemini 3.1 Pro Preview
gemini-3.1-pro-preview
|
1M | 65.5K | $2.00 | $12.00 | $4.50 | preview |
Gemini 3 Flash Preview
gemini-3-flash-preview
|
1M | 65.5K | $0.50 | $3.00 | $1.13 | preview |
Gemini 2.5 Pro
gemini-2.5-pro
|
1M | 65.5K | $1.25 | $10.00 | $3.44 | ga |
Gemini 2.5 Flash
gemini-2.5-flash
|
1M | 65.5K | $0.30 | $2.50 | $0.85 | ga |
Gemini 2.5 Flash-Lite
gemini-2.5-flash-lite
|
1M | 65.5K | $0.10 | $0.40 | $0.18 | ga |
Gemini 2.5 Computer Use Preview
gemini-2.5-computer-use-preview-10-2025
|
128K | 64K | $1.25 | $10.00 | $3.44 | preview |
D Verify before you commit
Model pricing changes without notice and this page is a snapshot. Confirm against the vendor's own page before you build a budget on it.
Source: ai.google.dev · checked 2026-09-06 · Google DeepMind pricing · API docs