FLUX.2 Klein 4B vs Qwen Image 3 Pro: side-by-side summary

FLUX.2 Klein 4B and Qwen Image 3 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.

Qwen Image 3 Pro, from Qwen, has a 65,536-token context window and is priced from $0.04/image on OpenRouter.

Context window

• FLUX.2 Klein 4B: 40,960 tokens
• Qwen Image 3 Pro: 65,536 tokens

Price

• FLUX.2 Klein 4B: $0.014/megapixel
• Qwen Image 3 Pro: from $0.04/image

Provided by

• FLUX.2 Klein 4B: black-forest-labs
• Qwen Image 3 Pro: Qwen

• FLUX.2 Klein 4B model details, providers and pricing
• Qwen Image 3 Pro model details, providers and pricing