FLUX.2 Pro vs Step3: side-by-side summary

FLUX.2 Pro and Step3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

FLUX.2 Pro, from black-forest-labs, has a 46,864-token context window and is priced at $0.03/megapixel on OpenRouter.

Step3, from stepfun-ai, has a 65,536-token context window and is priced by the provider serving it on OpenRouter.

Context window

• FLUX.2 Pro: 46,864 tokens
• Step3: 65,536 tokens

Price

• FLUX.2 Pro: $0.03/megapixel
• Step3: Pricing varies by provider

Provided by

• FLUX.2 Pro: black-forest-labs
• Step3: stepfun-ai

• FLUX.2 Pro model details, providers and pricing
• Step3 model details, providers and pricing