StepFun releases Step 5 Preview foundation model, ranks top 3 in global open-source leaderboard
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On March 20, StepFun released its new-generation flagship foundation model, Step 5 Preview, according to a report by STAR Market Daily. The model is designed for AI programming, software engineering, professional knowledge work, and finance, enhancing performance in real-world agentic tasks while balancing capability, cost, efficiency, and scenario coverage. In the Artificial Analysis Intelligence Index (AA Comprehensive Intelligence Index), a globally authoritative leaderboard, Step 5 Preview ranked among the top three open-source models worldwide. Notably, the per-task cost of this model is only one-eighth that of Claude Opus 5. StepFun plans to officially open-source Step 5 Preview on October 15. The report is by Huang Xinyi, a reporter for STAR Market Daily.
Source report
Shanghai, October 20 — According to a report by STAR Market Daily, StepFun has released its new-generation flagship foundation model, Step 5 Preview.
The model is primarily designed for use cases including:
- AI programming
- Software engineering
- Professional knowledge work
- Finance
Step 5 Preview enhances overall performance in real-world agentic tasks, achieving a balanced trade-off among capability, cost, efficiency, and scenario coverage. It further expands the optimal boundary between intelligence and cost.
In the Artificial Analysis Intelligence Index (AA Comprehensive Intelligence Index), a globally authoritative leaderboard, StepFun's Step 5 Preview ranked among the top three open-source models worldwide.
Notably, the per-task cost of this model is only one-eighth that of Claude Opus 5.
StepFun has announced that it will officially open-source Step 5 Preview on October 15.
— By Huang Xinyi, reporter for STAR Market Daily
Source
财联社Eastern
Part of this Story
StepFun’s Step 5 Preview ranks top three globally in open-source AI at one-eighth Claude Opus 5 cost