google/gemini-3.8-flash-tts idGemini 3.8 Flash TTS is Google’s text-to-speech model for expressive voice generation and custom character design across more than 100 languages. It creates original voices from natural language prompts and offers granular control over acting cues, pacing, accents, and conversational reactions. Long-form audio and native two-speaker dialogue make it well suited to immersive audiobooks, games, podcasts, and interactive media
# Drop-in OpenAI-compatible client$ import { generateText } from 'ai'$$ const { text } = await generateText({$ model: 'google/gemini-3.8-flash-tts',$ baseURL: 'https://synapse.garden/api/v1',$ apiKey: process.env.MG_KEY,$ prompt: 'Why is the sky blue?',$ })
| Rate | Per million tokens · USD |
|---|---|
| Input | $0.550/M |
| Output | $9.90/M |
| Cache read | $0.138/M |
Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘google/gemini-3.8-flash-tts’ and supply your Synapse Garden API key. No code changes beyond the base URL.
Input: $0.550/M per million tokens. Output: $9.90/M per million tokens. The free tier includes a million tokens every month at no cost.
Context window varies — check the live spec sheet at the top of this page.
No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.
Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.