Introducing Step Code v0.1.0. Swift execution. High token...
StepFun@StepFun_ai
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Sep 22, 2026
~1 min read
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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
GitHub: github.com/stepfun-ai/Ste…
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
GitHub: github.com/stepfun-ai/Ste…
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Step Code is built for strong task completion without wasteful token use.
On Terminal-Bench 2.1, it passed 72/89 tasks (80.9%), tying for the highest pass rate among the harnesses in our evaluation while using fewer tokens than the other tied leaders.
On Multi-Frame, it passed 110/150 tasks (73.3%) and averaged 5.09M tokens/task—the highest pass rate and lowest token use among six harnesses evaluated.
On Terminal-Bench 2.1, it passed 72/89 tasks (80.9%), tying for the highest pass rate among the harnesses in our evaluation while using fewer tokens than the other tied leaders.
On Multi-Frame, it passed 110/150 tasks (73.3%) and averaged 5.09M tokens/task—the highest pass rate and lowest token use among six harnesses evaluated.
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Step Code also includes StepPage: publish a local static site to a shareable URL with one command.
Version management and rollback are built in, so development, debugging, and delivery can stay in the same terminal.
Version management and rollback are built in, so development, debugging, and delivery can stay in the same terminal.
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Install Step Code on macOS, Linux, or WSL:
curl -fsSL static-openapi.stepfun.com/stepcode/insta… | bash
Windows: WSL is recommended. PowerShell support is currently in beta.
Issues and pull requests are welcome:
github.com/stepfun-ai/Ste…
curl -fsSL static-openapi.stepfun.com/stepcode/insta… | bash
Windows: WSL is recommended. PowerShell support is currently in beta.
Issues and pull requests are welcome:
github.com/stepfun-ai/Ste…
