S2 Pro vs Zonos v0.1 Transformer: side-by-side summary

S2 Pro and Zonos v0.1 Transformer are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

S2 Pro, from fish-audio, is priced at $15/M UTF-8 bytes on OpenRouter.

Zonos v0.1 Transformer, from zyphra, has a 4,096-token context window and is priced by the provider serving it on OpenRouter.

Context window

• S2 Pro: Not published
• Zonos v0.1 Transformer: 4,096 tokens

Price

• S2 Pro: $15/M UTF-8 bytes
• Zonos v0.1 Transformer: Pricing varies by provider

Provided by

• S2 Pro: fish-audio
• Zonos v0.1 Transformer: zyphra

• S2 Pro model details, providers and pricing
• Zonos v0.1 Transformer model details, providers and pricing