Event ·Multi-source

阶跃星辰开源 Step-5-Preview：600B 参数、100 万上下文

阶跃星辰发布开源模型 Step-5-Preview，总参数 600B，激活参数 27B。该模型输入和输出均支持 100 万上下文，与 Gemini 4 Argon 一致。作者认为其基准评分仅供参考，因为它只是一个 600B 规模的模型。

Current read

阶跃星辰把 Step-5-Preview 开源了，600B 参数只用激活 27B，输入输出都能吃 100 万上下文，长文档场景可以试试。

5 sources66° AI heatLast updated 2026/10/15 03:24:50

Evidence

5 sources

Primary sourceGorden Sun

2026/10/15 03:24:50View source

Related source 1IT之家

2026/10/15 03:22:04View source

Related source 2阶跃星辰 Stepfun

2026/10/15 13:00:01View source

Related source 3NVIDIA AI

2026/10/15 13:52:20View source

Related source 4爱范儿

2026/10/14 00:08:24View source

Conflict check

Dedup data only shows that these sources discuss the same event, not that they agree. There is no structured supporting or refuting evidence yet, so no conflict is inferred automatically.

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