Step 5 Preview ranks No. 7 among open-weight models on Vals
Vals AI says StepFun’s Step 5 Preview has debuted on the Vals leaderboard at No. 7 among open-weight models, just ahead of Qwen 3.8 Max, at $2.54 per task.
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View all AI newsStepFun Step 5 Preview scores 44 on Artificial Analysis Intelligence Index at $0.71 per task
StepFun highlighted Artificial Analysis results putting Step 5 Preview at 44 on the Intelligence Index and $0.71 per task, with more to come on Oct 15. The evaluation describes a 600B/27B MoE flagship with first-party API access and open weights planned for October 15.
elvis: StepFun Step 5 Preview matched GLM 5.3 on two real coding tasks
elvis (@omarsar0) says he early-tested StepFun’s new Step 5 Preview as a coding agent. He reports that it and GLM 5.3 both solved two real repository tasks with no fix rounds, that Step 5 Preview stopped after checking its work, and that it found five hidden clues in a ~368K-token long-context test.