Step 5 Preview, a 1M-context MoE from StepFun, shows up on OpenRouter

StepFun's Step 5 Preview, a mixture-of-experts model with 1 million token context, is now available on OpenRouter for agentic tasks. The model features 27B active parameters out of 600B total and is optimized for software engineering, professional knowledge work, and finance, with pricing at $1 per million input tokens and $2.70 per million output tokens. It achieved 99.43% availability and 103 tokens per second throughput on the platform.