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