Gemini 3.8 text-to-speech models now available on AI Gateway

Google's Gemini 3.8 Flash-Lite TTS and Gemini 3.8 Flash TTS models are now available on Vercel's AI Gateway, generating speech in more than 100 languages. The Flash-Lite model targets high-volume speech generation with controls for tone, pacing, and line-by-line delivery, while the Flash model adds voice and character design via natural-language prompts including acting cues, accents, and conversational reactions. AI Gateway provides a single API for speech generation with per-request usage and cost tracking, plus configurable routing rules and bring-your-own-provider-key support.

Gemini 3.8 Flash-Lite TTS https://vercel.com/ai-gateway/models/gemini-3.8-flash-lite-tts and Gemini 3.8 Flash TTS https://vercel.com/ai-gateway/models/gemini-3.8-flash-tts from Google are now available on AI Gateway https://vercel.com/ai-gateway . Both models take text and generate speech in more than 100 languages. They support long-form narration, control over delivery, and two-speaker dialogue. google/gemini-3.8-flash-lite-tts is suited to high-volume speech generation, with controls for tone, pacing, and line-by-line delivery. google/gemini-3.8-flash-tts adds voice and character design through natural-language prompts, including acting cues, accents, and conversational reactions. Generate and listen to speech in the Flash-Lite TTS playground https://vercel.com/ai-gateway/models/gemini-3.8-flash-lite-tts or the Flash TTS playground https://vercel.com/ai-gateway/models/gemini-3.8-flash-tts . For setup instructions and more code examples, see the speech quickstart https://vercel.com/docs/ai-gateway/getting-started/speech and text-to-speech guide https://vercel.com/docs/ai-gateway/modalities/text-to-speech . AI Gateway provides one API for speech generation alongside your other models, with usage and cost tracking for each request. You can configure routing rules https://vercel.com/docs/ai-gateway/models-and-providers/routing-rules and bring your own provider key https://vercel.com/docs/ai-gateway/authentication-and-byok/byok .