Introducing Step Code v0.1.0.
Swift execution. High token efficiency. Long-horizon reliability.
Now open source under the MIT License.
Step Code handles the full development loop—from reading and editing code to running tests and shipping—from one CLI.
• 80.9% on Terminal-Bench 2.1 in evaluation • 73.3% on Multi-Frame, our 150-task long-horizon benchmark • One-command static site publishing with StepPage