Simon Willison builds a playground UI for Gemini 3.8 TTS

Simon Willison @simonwOriginally posted 2026.09.24

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The new Gemini 3.8 TTS models are super-cheap and can generate conversations between multiple voices (from 2,000+, or you can clone your own) - I built a little UI for it, then had Claude knock up a script where two pelicans debate moving to Pacifica Pier https://simonwillison.net/2026/Sep/23/gemini-tts-playground/