Key Info

Step 5 Preview, StepFun's 600B open-weight MoE model with 27B active parameters, is now available on DeepInfra from day zero, with published API pricing.

Highlights

  • 600B open-weight MoE with 27B active parameters, FP8 precision
  • 1M-token context window with both text and vision support
  • Pricing: $1.00 per 1M input tokens, $2.70 per 1M output tokens, $0.05 per 1M cached tokens
  • Positioned for long-horizon agents such as coding, frontend, and finance workloads