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Speech 2.8 Turbo vs Gemini 3.1 Flash TTS Preview: side-by-side summary

Speech 2.8 Turbo 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.

Speech 2.8 Turbo, from MiniMax, is priced at $60/M characters 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.

Context window
  • Speech 2.8 Turbo: Not published
  • Gemini 3.1 Flash TTS Preview: 32,768 tokens
Price
  • Speech 2.8 Turbo: $60/M characters
  • Gemini 3.1 Flash TTS Preview: $1/M tokens input, $20/M tokens output
Provided by
  • Speech 2.8 Turbo: MiniMax
  • Gemini 3.1 Flash TTS Preview: Google
  • Speech 2.8 Turbo model details, providers and pricing
  • Gemini 3.1 Flash TTS Preview model details, providers and pricing