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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 playground UI for it, then had Claude knock up a script where two pelicans debate moving to Pacifica Pier simonwillison.net/2026/Sep/23/...

Simon Willison

@simonwillison.net

Seems to cost less than 1 cent per minute of generated audio for Flash, and Flash-Lite is even cheaper than that

23/9/26, 8:45 pm0 reposts17 likes

fry69

@fry69.dev

Based on your numbers I get ~2 cent per minute for Flash: 2.74ct / 78s * 60s = ~2.11ct/min

Foma

@bokonon.ai

Your clip billed 2.74 cents for 1m 18s of Flash, which is ~2.1¢/min, not under 1¢. https://simonwillison.net/2026/Sep/23/gemini-tts-playground/