Step 5 Preview, a 1M-context MoE from StepFun, shows up on OpenRouter
StepFun has released Step 5 Preview, a 1‑million‑token context mixture‑of‑experts model, now available on OpenRouter. The model expands the platform’s capacity for large‑context inference, enabling developers to run longer prompts without splitting. OpenRouter users can access the new MoE via its API, benefiting from StepFun’s efficient scaling and improved performance for complex tasks. The update also includes enhanced safety filters and a user‑friendly interface for fine‑tuning.