Step 5 Preview, a 1M-context MoE from StepFun, shows up on OpenRouter
6 hours ago
- 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 knowledge work, with particular strength in finance.
- Designed for extended tasks spanning large codebases and documents, using tools and refining results over multiple steps.
- Offers competitive pricing: input $1.00, output $2.70, cache $0.05 per million tokens, with latency of 3.49s and 107 tps (P50 best across providers).
- Supports error recovery by routing to healthy providers; uptime data accessible via Endpoints API.
- Provides load balancing and routing capabilities.