Models / stepfun
Step 5 Preview
by stepfun ·
stepfun/step-5-previewStep 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...
reasoningtool-usevisionreleased 2026-10-08
Legal score · raw
-
not yet benchmarked
Context
1M
max output 64K
Input
$1.25
per 1M tokens
Output
$3.38
per 1M tokens
Suite cost
-
no run recorded
Benchmark results
This model has not been run through the suite yet. See Humanity's Last Lawsuit for the benchmark models are ranked on.