Key Info

Step 5 Preview is now free in Cline, scoring ahead of Kimi K3 and GLM-5.3 on the DeepSWE benchmark, making it one of the strongest open-weights coding models available.

Highlights

  • Step 5 Preview is described as a flagship model for agentic work with frontier-level performance in software engineering and professional knowledge work
  • Architecture: 600B total / 27B active MoE with 1M context window
  • On DeepSWE, it scores ahead of Kimi K3 and GLM-5.3
  • Accessible for free in Cline via CLI (npm i -g cline) or the new Desktop app