阶跃星辰发布 Step 5 Preview 旗舰模型，10 月 15 日开放权重

2026-09-20 11:15· 1小时前

AI 导读

阶跃星辰发布旗舰模型 Step 5 Preview，主打智能体工作，在软件工程和专业知识工作中达到前沿水平，金融领域尤其突出。模型为 600B 总参数 / 27B 激活的 MoE，支持 1M 上下文和视觉能力，官方称在相当智能水平下任务成本明显更低，已可在 platform.stepfun.ai 试用，开放权重将于 10 月 15 日放出。

Introducing Step 5 Preview: Advancing the Pareto Frontier.

Step 5 Preview is our new flagship model for agentic work, delivering frontier-level performance across software engineering and professional knowledge work, with particular strength in finance.

• 600B total / 27B active MoE, with 1M context + Vision • Substantially lower task cost at comparable intelligence • Broad software engineering capabilities with sustained execution over long horizons

Try Step 5 Preview: https://platform.stepfun.ai Model page: https://www.stepfun.com/step-5-preview

Open weights on Oct 15.