StepFun (@StepFun_ai) released Step Code v0.1.0 as MIT open source. The company says one CLI covers the full loop from reading and editing code to running tests and shipping, with fast execution, high token efficiency, and long-horizon reliability. Reported scores: about 80.9% on Terminal-Bench 2.1 and 73.3% on their 150-task Multi-Frame benchmark, plus one-command static publishing via StepPage. Repo: https://github.com/stepfun-ai/Step-Code

Key Takeaways

  • ✓MIT-licensed CLI covering the full read-edit-test-ship loop.
  • ✓Reported ~80.9% on Terminal-Bench 2.1 and ~73.3% on Multi-Frame (150 tasks).
  • ✓StepPage adds one-command static site publishing.
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