StepFun's Step 5 Preview early tests: Pareto frontier on cost vs. capability
StepFun_ai · x · 2026-09-21
omarsar0 shared early hands-on impressions of StepFun's new Step 5 Preview model, testing it mainly as a coding agent.
His verdict: it sits on the Pareto frontier for cost vs. capability, is comparable to GLM 5.3, Kimi K3, and others, and comes at a very competitive price — "worth trying in your favorite coding agent." StepFun's official account thanked him. One of the first third-party test reports on this model.
Related event: StepFun Surprises with Step 5 Preview, Touting Cost-Performance Frontier(4 posts)→
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