StepFun Launches Step 5 Preview: A 600B-Total, 27B-Active MoE Model With 1M Context for Long-Horizon Agentic Work
StepFun released Step 5 Preview, a sparse Mixture-of-Experts model with about 600B total parameters and about 27B activated per token, offering a 1M-token context window and text, image, and video input through a hosted …