GoKawiilStepFun's Step 5 Preview MoE model appears on OpenRouter with 1M context
StepFun has released Step 5 Preview, a sparse Mixture-of-Experts model with 27B active and 600B total parameters, now listed on OpenRouter. The model targets agentic workflows, supporting a 1-million-token context window for handling large codebases and documents. StepFun highlights its strength in software engineering, professional knowledge work, and finance-related tasks.