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Gemini 3.1 Flash TTS Preview: free via FreeLLMAPI

Gemini 3.1 Flash TTS Preview: served free by 1 provider, up to ? context. Live limits, quirks, and quota on freellmapi.co.

Google AI Studio

gemini-3.1-flash-tts-preview
Free budgetWAV/PCM · 30+ voices
Requests / min3 RPM
Requests / day15 RPD

Get this model the moment it changes

Limits move, models get replaced, better ones launch. Premium routers see this page's data live. Free routers see last month's.

Kích hoạt trực tiếp · $19/yr →

Use it

FreeLLMAPI is a self-hosted router you run yourself. Install it, paste in your free Google AI Studio key, and gemini-3.1-flash-tts-preview answers on an OpenAI-compatible endpoint at http://localhost:3001/v1. No credit card, no hosted middleman: your prompts and your provider keys never leave your machine.

Install the router (macOS, Linux, WSL)
curl -fsSL https://freellmapi.co/install.sh | bash
Install the router (Windows PowerShell)
iwr -useb https://freellmapi.co/install.ps1 | iex
Call gemini-3.1-flash-tts-preview with curl
curl http://localhost:3001/v1/audio/speech \
  -H "Authorization: Bearer freellmapi-your-unified-key" \
  -H "Content-Type: application/json" \
  -d '{"model": "gemini-3.1-flash-tts-preview", "input": "Hello from FreeLLMAPI."}' \
  --output speech.mp3
The same request in Python (openai)
from openai import OpenAI

client = OpenAI(
    base_url="http://localhost:3001/v1",
    api_key="freellmapi-your-unified-key",
)

with client.audio.speech.with_streaming_response.create(
    model="gemini-3.1-flash-tts-preview",
    input="Hello from FreeLLMAPI.",
) as resp:
    resp.stream_to_file("speech.mp3")

The router answers on /v1/audio/speech and every other OpenAI surface, plus the Anthropic Messages API, so existing clients need only a new base_url. Swap the model id for auto and the router picks the best free model that is still under its limits. Full reference: docs/api.md.