Google: Gemini 3.1 Flash TTS
Google Gemini 3.1 Flash TTS API pricing
Gemini 3.1 Flash TTS costs $0.400 per million tokens on Oxyy, one rate for input and output. That is the pay-as-you-go price after the current 60% discount (Launch Promo; standard price $1.00). It takes text as input and returns audio. A cheaper Google option is Gemini 2.5 Flash TTS at $0.200 per 1M tokens; for every model and rate, see Gemini API pricing.
Providers
Where this model runs, and what each route costs. Requests are sent to a healthy provider automatically; if one errors, the gateway retries against another serving the same model.
| Provider | Tokens /M | Latency | Throughput |
|---|---|---|---|
| $0.400 | 4.81s | — |
Capabilities (8)
Supported parameters (5)
The endpoint's own fields, shown in the quickstart below, are required as well; a request without them is rejected.
Pricing
What this model costs on Oxyy, pay as you go. "Charged" is the rate a request is billed at; the standard price is shown beside it for reference.
| Rate | Standard price | Charged | Unit |
|---|---|---|---|
| Tokens (input + output) | $1.00 | $0.400 | per 1M tokens, input and output |
Discount. Charged rates include the current "Launch Promo" discount of 60% on every rate.
Specifications
- Model ID
gemini-3.1-flash-tts-preview- Developer
- Type
- Text to speech
- Input
- Text
- Output
- Audio
- Context window
- 32,768 tokens
- Max output
- 16,384 tokens
- Released
- Apr 15, 2026
- Endpoint
/v1/audio/speech
Quickstart
Call gemini-3.1-flash-tts-preview with a POST to /v1/audio/speech on https://api.oxyy.ai, using your Oxyy API key from the OXYY_API_KEY environment variable. The same key works for every model in the catalog.
import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.oxyy.ai/v1",
api_key=os.environ["OXYY_API_KEY"],
)
with client.audio.speech.with_streaming_response.create(
model="gemini-3.1-flash-tts-preview",
voice="alloy",
input="Hello from Oxyy.",
response_format="mp3",
) as response:
response.stream_to_file("speech.mp3")Performance
Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better). Throughput and TTFT are measured on streaming requests, which are the only ones with a first-token moment to time.
Throughput
Latency
Time to first token
Cache hit rate
Activity
Token volume and request traffic to this model over time. Daily totals, UTC.
Prompt tokens measure input size. Completion tokens reflect total output length. Reasoning is not priced separately for this model, so it is not itemised here.
Frequently asked questions
What is Gemini 3.1 Flash TTS?
How much does Gemini 3.1 Flash TTS cost?
How do I call Gemini 3.1 Flash TTS through the API?
What inputs and outputs does Gemini 3.1 Flash TTS support?
When was Gemini 3.1 Flash TTS released?
What other models does Google have?
Alternatives to Gemini 3.1 Flash TTS
Models of the same kind from other vendors, closest in price first. Prices are pay-as-you-go on Oxyy, through the same API key.