StepFun's Step 5 Preview lands on Artificial Analysis's Pareto frontier

Stepfun Step 5 Preview (LLM): On AA Pareto frontier

Artificial Analysis's latest model page evaluates StepFun's Step 5 Preview, an LLM that sits on the Pareto frontier for intelligence versus cost. The analysis covers the Artificial Analysis Intelligence Index v4.3, which aggregates ten evaluations including AA-Briefcase, Terminal-Bench 4.0, and Humanity's Last Exam, alongside token usage, pricing, and context window details. The placement signals competitive performance per dollar among current models.