StepFun: Step 5 Preview
stepfun/step-5-preview
Step 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...
Modalities
In / Out Price
$1 / $2.70 per 1M
Context
1M
Released
Oct 8, 2026
Knowledge Cutoff
—
Activity
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