Claude Opus 4.6 vs Riverflow V2 Fast Preview: side-by-side summary

Claude Opus 4.6 and Riverflow V2 Fast Preview are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Opus 4.6, from Anthropic, has a 1,000,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.

Riverflow V2 Fast Preview, from Sourceful, has a 8,192-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Claude Opus 4.6: 1,000,000 tokens
• Riverflow V2 Fast Preview: 8,192 tokens

Price

• Claude Opus 4.6: $5/M tokens input, $25/M tokens output
• Riverflow V2 Fast Preview: Pricing varies by provider

Provided by

• Claude Opus 4.6: Anthropic
• Riverflow V2 Fast Preview: Sourceful

• Claude Opus 4.6 model details, providers and pricing
• Riverflow V2 Fast Preview model details, providers and pricing