Free S2.1-Pro text-to-speech API model (s2.1-pro-free) under fair-use limits
Fish Audio is an AI text-to-speech and voice cloning platform with a developer API. Its docs list s2.1-pro-free, the same model as S2.1-Pro at $0 for development and testing under fair-use limits, usable on a new account before adding any API credit.
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