Gemini 3 Pro Preview vs Riverflow V2 Fast Preview: side-by-side summary

Gemini 3 Pro Preview 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.

Gemini 3 Pro Preview, from Google, has a 1,048,576-token context window and is priced by the provider serving it 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

• Gemini 3 Pro Preview: 1,048,576 tokens
• Riverflow V2 Fast Preview: 8,192 tokens

Price

• Gemini 3 Pro Preview: Pricing varies by provider
• Riverflow V2 Fast Preview: Pricing varies by provider

Provided by

• Gemini 3 Pro Preview: Google
• Riverflow V2 Fast Preview: Sourceful