Search/
Skip to content
/
OpenRouter
© 2026 OpenRouter, Inc

Product

  • Chat
  • Rankings
  • Apps
  • Models
  • Providers
  • Pricing
  • Enterprise
  • Labs

Company

  • About
  • Announcements
  • CareersHiring
  • Privacy
  • Terms of Service
  • Support
  • State of AI
  • Works With OR

Developer

  • Documentation
  • API Reference
  • SDK
  • Status

Connect

  • Discord
  • GitHub
  • LinkedIn
  • X
  • YouTube
Favicon for stepfun

stepfun

Access 2 stepfun models on OpenRouter including Step 3.5 Flash and Step 3.5 Flash (free). Compare pricing, context windows, and capabilities.

stepfun tokens processed on OpenRouter

  • StepFun: Step 3.5 FlashStep 3.5 Flash
    42.7B tokens

    Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token. It is a reasoning model that is incredibly speed efficient even at long contexts.

    by stepfunJan 29, 2026256K context$0.10/M input tokens$0.30/M output
tokens
  • StepFun: Step 3.5 Flash (free)Step 3.5 Flash (free)Free variant
    1.41T tokens

    Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token. It is a reasoning model that is incredibly speed efficient even at long contexts.

    by stepfunJan 29, 2026256K context$0/M input tokens$0/M output tokens