Compare S1 from fish-audio and Gemini 3.1 Flash TTS Preview from Google on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
S1 and Gemini 3.1 Flash TTS Preview are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
S1, from fish-audio, is priced at $15/M UTF-8 bytes on OpenRouter.
Gemini 3.1 Flash TTS Preview, from Google, has a 32,768-token context window and is priced at $1/M tokens input, $20/M tokens output on OpenRouter.