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阶跃星辰开放 Step 5 Preview 权重，四家芯片厂商宣布首发适配

阶跃星辰开放了 Step 5 Preview 的 BF16 和 FP8 权重，已上线 Hugging Face 和 ModelScope。开发者可用 vLLM 或 SGLang 部署兼容 OpenAI 接口的服务，也可通过 Transformers 离线推理；华为、壁仞科技、沐曦股份和摩尔线程随后宣布提供首日支持。

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Step opens Step 5 Preview model weights with support for a 1 million-token context

Step has released BF16 and FP8 weights for Step 5 Preview, now available on Hugging Face and ModelScope. According to the company, the model supports a 1 million-token context and text and visual input. Developers can deploy an API service with vLLM or SGLang, or run offline inference with Transformers.

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IT之家 科技新闻 精选 机器翻译
编辑优先级 60/100
Step 5 Preview weights released as four chipmakers announce day-one support

Step 5 Preview’s BF16 and FP8 weights are available on Hugging Face and ModelScope. Developers can deploy an OpenAI-compatible API service with vLLM or SGLang, or run offline inference with Transformers. Huawei, Biren Technology, MetaX and Moore Threads subsequently announced day-one support.

推荐理由：权重已可获取，并给出了服务部署和离线推理路径；四家芯片厂商也宣布首日支持，方便关注模型使用与部署的读者判断当前进展。
IT之家 科技新闻 同事件 机器翻译
编辑优先级 54/100
Step opens Step 5 Preview model weights with support for a 1 million-token context

Step has released BF16 and FP8 weights for Step 5 Preview, now available on Hugging Face and ModelScope. According to the company, the model supports a 1 million-token context and text and visual input. Developers can deploy an API service with vLLM or SGLang, or run offline inference with Transformers.

同一事件，精选展示《阶跃星辰开放 Step 5 Preview 权重，四家芯片厂商宣布首发适配》