Gemini 3.8 Flash-Lite TTS

audio-tts

Gemini 3.8 Flash-Lite TTS is a fast, cost-efficient text-to-speech model optimized for high-throughput production workloads.

MODALITIES

audio

RELEASED

2026-10-06

Gemini 3.8 Flash-Lite TTS (google/gemini-3.8-flash-lite-tts) is a audio-tts model from Google, released 2026-10-06. Pricing via AIgateway: $0.015 per 1K chars. Capabilities: tools, vision, json. Call it via https://api.aigateway.sh/v1/audio/speech — set model="google/gemini-3.8-flash-lite-tts".

model · google/gemini-3.8-flash-lite-ttsfamily · Gemini 3

Use this model

model: google/gemini-3.8-flash-lite-tts

curl https://api.aigateway.sh/v1/audio/speech \
  -H "Authorization: Bearer $AIGATEWAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"google/gemini-3.8-flash-lite-tts","voice":"alloy","input":"Hello, world."}'

curl https://api.aigateway.sh/v1/audio/speech \ -H "Authorization: Bearer $AIGATEWAY_API_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"google/gemini-3.8-flash-lite-tts","voice":"alloy","input":"Hello world."}' \ --output out.mp3

Capabilities

Tool callingVisionJSON mode

Pricing

Per 1K chars$0.015

You pay pass-through pricing.

See API example →Compare API reference See usage ranking →

Collections

More audio models →More from Google →Frontier models →Free-tier models →

API schema

Call Gemini 3.8 Flash-Lite TTS from any OpenAI SDK

POST https://api.aigateway.sh/v1/audio/speech·Content-Type: application/json·Auth: Bearer sk-aig-...

Request body

json

{
  "model": "google/gemini-3.8-flash-lite-tts",
  "input": "Hello from AIgateway.",
  "voice": "alloy",
  "format": "mp3",        // mp3 | wav | flac | opus
  "speed": 1.0
}

Response

json

// Binary audio stream in the requested format (mp3 by default).
// Content-Type: audio/mpeg  (or audio/wav, audio/flac, audio/opus)
// Read the response body directly to a file.

Quickstart

from openai import OpenAI
client = OpenAI(base_url="https://api.aigateway.sh/v1", api_key="sk-aig-...")

r = client.audio.speech.create(model="google/gemini-3.8-flash-lite-tts", voice="alloy", input="Hello world.")
r.stream_to_file("out.mp3")

Errors

401authentication_errorInvalid or missing API key

402insufficient_creditsWallet empty (PAYG only)

404not_foundUnknown model or endpoint

429rate_limit_errorOver per-minute limit — see Retry-After header

500server_errorUpstream provider failed (retryable)

503service_unavailableUpstream saturated (retryable)

Full docs →API reference →OpenAPI spec →llms.txt →

Frequently asked questions

What is Gemini 3.8 Flash-Lite TTS?

Gemini 3.8 Flash-Lite TTS is a fast, cost-efficient text-to-speech model optimized for high-throughput production workloads. It is a audio-tts model from Google, accessible via AIgateway's OpenAI-compatible API at slug google/gemini-3.8-flash-lite-tts.

How much does Gemini 3.8 Flash-Lite TTS cost via AIgateway?

Pass-through pricing. See the pricing panel on this page for exact rates.

How do I call Gemini 3.8 Flash-Lite TTS from my code?

Point the OpenAI SDK at https://api.aigateway.sh/v1 with your AIgateway key and set model to "google/gemini-3.8-flash-lite-tts". The request and response shapes match OpenAI exactly.

Does Gemini 3.8 Flash-Lite TTS support streaming, tool calling, vision, and JSON mode?

Streaming — no. Tool calling — yes. Vision — yes. JSON mode — yes. Prompt caching — no.

Can I bring my own Google API key (BYOK)?

Yes. Attach a Google key in your AIgateway dashboard and this model flips to pass-through — you pay Google directly and AIgateway adds no platform fee on those calls.