S1 vs CSM 1B: side-by-side summary

S1 and CSM 1B 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.

CSM 1B, from sesame, has a 4,096-token context window and is priced at $7/M characters on OpenRouter.

Context window

• S1: Not published
• CSM 1B: 4,096 tokens

Price

• S1: $15/M UTF-8 bytes
• CSM 1B: $7/M characters

Provided by

• S1: fish-audio
• CSM 1B: sesame

• S1 model details, providers and pricing
• CSM 1B model details, providers and pricing