Google

Gemini 3.1 Flash Live

Name: Gemini 3.1 Flash Live
Brand: Google
Price: 0.03888 USD
Availability: InStock

A WebSocket-based audio-to-audio model designed for low-latency spoken dialogue and voice agents. Reach for it when migrating from Gemini 2.5 Flash Native Audio or when you need native round-trip audio processing.

Modalities

Text → Audio

Price

$0.0389 / min

Speed

fast

Pricing

Per minute of audio processed. Min billable: 1 minute.

$0.0389 / min

When to use Gemini 3.1 Flash Live

Updated 2026-07-31

Where this model earns its cost — and where it doesn't.

Gemini 3.1 Flash Live is a realtime audio-to-audio model from Google. It processes native audio input and returns native audio output in a single WebSocket round-trip, supporting a 131,072-token context window and up to 65,536 output tokens.

On Kyma, it runs behind an OpenAI-compatible endpoint with automatic request failover if a serving path degrades. New accounts receive $0.50 in free credit, and prompt caching is supported, billing repeated prefixes at 10% of the standard input rate. The platform returns exact request cost in usage.cost and the active model ID in the X-Kyma-Model header.

The model does not support reasoning, vision, or structured outputs. It operates strictly on audio modalities and is billed per minute. It serves as the direct successor to Gemini 2.5 Flash Native Audio, which retires on 2026-10-20.

Low-Latency Voice Agents

Handles real-time spoken conversations with native audio input and output in a single WebSocket connection.

Speech Generation Workflows

Converts audio prompts into synthesized speech without intermediate transcription steps.

Interactive Spoken Chat

Powers conversational interfaces that require immediate audio responses for hands-free applications.

Not ideal for: Do not use this model if your application requires text-based reasoning, image understanding, or strictly formatted JSON outputs.

Quick start

Up and running in under two minutes.

1
Create an API key
Sign up and grab a key from the dashboard — $0.50 free credit, no card required.
Get API key →

Make your first request

Drop in your key and send a chat completion — fully OpenAI-compatible.

curl https://kymaapi.com/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-3.1-flash-live-preview",
    "messages": [
      {"role": "user", "content": "Explain prompt caching in one paragraph."}
    ]
  }'

Stream responses

Add "stream": true to receive tokens as they arrive.

curl https://kymaapi.com/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-3.1-flash-live-preview",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

FAQ

Common questions about this model.

How much does Gemini 3.1 Flash Live cost?

$0.0389 per min. Per minute of audio processed. Min billable: 1 minute.

How do I use Gemini 3.1 Flash Live?

Kyma is OpenAI-compatible: point your SDK's base URL at https://kymaapi.com/v1, use your Kyma API key, and set the model to gemini-3.1-flash-live-preview. Signing up is free and includes $0.50 of credit — no card required.

How is billing calculated for this model?

Requests are billed per minute of active audio processing rather than by token count, with repeated prompt prefixes discounted to 10% when caching is enabled.

Can I use this model for text generation or image analysis?

No, the model only accepts audio input and returns audio output; it does not support vision, reasoning, or structured text outputs.

How does Kyma handle model availability and routing?

Every request uses automatic failover to reroute traffic if a serving path degrades, and the exact model that processed the request is returned in the X-Kyma-Model header.

Start with $0.50 free credit — no card required.Create account →

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Model	Context	Input	Output
Gemini 3.6 Flash	1M	$2.025	$10.125
Gemini 3.5 Flash Lite	1M	$0.405	$3.375
Gemini 3.5 Live Translate	—	$0.0635 / min
Gemini 3.5 Flash	1M	$2.025	$12.15
Gemma 4 31B	128K	$0.0702	$0.2006
Nano Banana 3 Flash (preview)	—	$0.046 / image
Gemini 3 Flash (Audio)	—	$0.0026 / min
Gemini 3 Flash	1M	$0.3375	$1.35