Key Info

StepFun has introduced Step Code v0.1.0, an open-source (MIT) AI coding agent that handles the full development loop—from reading and editing code to running tests and deploying—via a single CLI, with built-in StepPage for publishing static sites.

Highlights

  • Scores 80.9% on Terminal-Bench 2.1 and 73.3% on Multi-Frame, its own 150-task long-horizon benchmark.
  • Combines Swift execution and high token efficiency with long-horizon reliability.
  • StepPage allows one-command publishing of local static sites with built-in version management and rollback.
  • Installable on macOS, Linux, or WSL via a curl script; PowerShell support is in beta.