Step 5 Preview
by Stepfun
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 softwar
Models
Step 5 Preview
Added 8 Oct 2026
Overview
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...
How to use / API access
Call via OpenRouter with model id `stepfun/step-5-preview`.
- openrouter ·
stepfun/step-5-previewDocs
OpenRouter id: stepfun/step-5-preview
Benchmarks
- Intelligence Index (artificial-analysis) : 43.7 index
Notes
Step 5 Preview is listed in the EDNA Models directory from the OpenRouter catalogue.
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