FLUX.2 Klein 4B vs Riverflow V2.5 Pro: side-by-side summary

FLUX.2 Klein 4B and Riverflow V2.5 Pro are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

FLUX.2 Klein 4B, from black-forest-labs, has a 40,960-token context window and is priced at $0.014/megapixel on OpenRouter.

Riverflow V2.5 Pro, from Sourceful, has a 32,768-token context window and is priced from $0.13/image on OpenRouter.

Context window

• FLUX.2 Klein 4B: 40,960 tokens
• Riverflow V2.5 Pro: 32,768 tokens

Price

• FLUX.2 Klein 4B: $0.014/megapixel
• Riverflow V2.5 Pro: from $0.13/image

Provided by

• FLUX.2 Klein 4B: black-forest-labs
• Riverflow V2.5 Pro: Sourceful

• FLUX.2 Klein 4B model details, providers and pricing
• Riverflow V2.5 Pro model details, providers and pricing