Gemini 3.1 Flash TTS: the next generation of expressive AI speech

The press release centers on 'granular audio tags' as the differentiating feature, but Google has offered prosody and style controls in its TTS products before, and the announcement does not clarify how this implementation differs technically from prior approaches or from competitors like ElevenLabs and OpenAI's voice API.

This is the fourth Gemini-branded release Modelwire has covered in roughly four days. Gemini Robotics-ER 1.6 (April 13) pushed into physical reasoning, the Google Photos integration (April 16, via The Verge and Ars Technica) extended Gemini into personal data, and Chrome Skills (April 14, Ars Technica) targeted workflow reuse. The pattern is a coordinated surface-area expansion across modalities, not isolated product drops. TTS fits that framing, but the audio space specifically is one where Google has repeatedly announced capabilities that took months to reach developers at the quality levels advertised.

Watch whether the audio tag specification is published as an open standard or remains proprietary to Gemini API access. If third-party developers report parity with ElevenLabs on naturalness benchmarks within 60 days of general availability, the 'expressive' claim has substance; if the launch stays demo-only, this is positioning ahead of Google I/O.