S1 vs Grok Voice TTS 1.0: side-by-side summary

S1 and Grok Voice TTS 1.0 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.

Grok Voice TTS 1.0, from SpaceXAI, has a 15,000-token context window and is priced at $15/M characters on OpenRouter.

Context window

• S1: Not published
• Grok Voice TTS 1.0: 15,000 tokens

Price

• S1: $15/M UTF-8 bytes
• Grok Voice TTS 1.0: $15/M characters

Provided by

• S1: fish-audio
• Grok Voice TTS 1.0: SpaceXAI

• S1 model details, providers and pricing
• Grok Voice TTS 1.0 model details, providers and pricing