Gemini 3.8 text-to-speech models now available on AI Gateway
Vercel AI Gateway now exposes two Gemini 3.8 TTS models for multilingual speech, separating high-volume generation from prompt-driven voice design.
AI Gateway now offers **Gemini 3.8 Flash-Lite TTS** and **Gemini 3.8 Flash TTS**. Both generate speech in **more than 100 languages** and support long narration and two-speaker dialogue.
Use Flash-Lite for high-volume output with tone, pacing, and line-level controls. Choose Flash when an agent needs prompt-driven voice or character design, including acting cues, accents, and reactions.
AI Gateway now offers **Gemini 3.8 Flash-Lite TTS** and **Gemini 3.8 Flash TTS**. Both generate speech in **more than 100 languages** and support long narration and two-speaker dialogue. Use Flash-Lite for high-volume output with tone, pacing, and line-level controls. Choose Flash when an agent needs prompt-driven voice or character design, including acting cues, accents, and reactions. The material describes capabilities and gateway features such as routing, request-level usage tracking, and provider keys, but provides no pricing, latency, quality evaluation, or language-by-language results.
This turns the Gateway’s audio offering into a clearer output-side choice: Flash-Lite targets controlled volume production, while Flash targets prompt-shaped performance and character work. It complements existing transcription routes and overlaps Fish Audio’s speech generation, but the supplied record still supports only integration-level evaluation—not a quality, latency, or cost preference.