Gemini 3.1 Flash TTS for Next.js: ship voice UX in 15 min (2026)

Google released Gemini 3.1 Flash TTS as a public preview, featuring over 200 inline audio tags, 30 prebuilt voices, and support for 70+ languages. This TTS model aims to simplify voice UX implementation in Next.js applications, being significantly cheaper than alternatives like ElevenLabs.