Chinese contentIDC 首份汽车 AI 座舱报告：2026 上半年火山引擎份额第一、阿里第二
火山引擎靠 45% 份额拿下 IDC 首份 AI 座舱报告的头名，阿里第二，还附带了市场规模和各家打法，做车机方向可以看看。
IT之家Source
StepFun阶跃星辰
China·Shanghai
Step multimodal models
What they do
Founded in Shanghai in 2023, StepFun builds the Step model series across language, image, speech and video, and works with phone and car makers on on-device agents.
Latest coverage
Stories in the feed that mention this companyChinese contentTogether AI 联合 StepFun 在旧金山举办 Step 5 预览发布夜
StepFun 的 Step 5 要在旧金山线下预览了，Together AI 操办，还会聊怎么跑 Agent 工作负载，在湾区的话可以去现场听。
Chinese contentStepFun 开源 Step 5 Preview 权重并宣布旧金山发布活动
StepFun 把 Step 5 Preview 权重放出来了，还约了 Together Compute 在旧金山办线下发布夜，能现场看模型演示，做 AI 创业的朋友可以去报名。
Arena Alignment Index adds Meta Muse Wonder, Reflection Beam 1.0, Step 5 Preview
The index measures failure modes most leaderboards ignore: unauthorized actions, false attribution and deceptive completion, so lab rankings can shift even when capability scores stay flat. Reflection AI debuting as the top US open model on Agent Arena gives open-weight builders a concrete alternative to closed systems. StepFun's entry at 75.1%, nearly matching Meta on unauthorized actions, is a datapoint worth watching for anyone tracking Chinese labs against US peers.
Chinese contentStepFun 开源 Step 5 Preview：600B 参数 MoE，100 万上下文
StepFun 把 Step 5 Preview 的权重直接开源了，600B 的 MoE 模型每次只激活 27B，还能塞 100 万 token 上下文，Hugging Face 上就能下载。
StepFun's Step 5 Preview hits #2 on OpenRouter leaderboard
Usage on OpenRouter is a proxy for real developer demand, and 19.5T tokens in a first week puts Step 5 Preview alongside the most-routed open models worldwide. Teams choosing inference backends can compare its cost and throughput against Qwen and DeepSeek offerings on the same leaderboard. Its traction also signals continued Chinese lab momentum in the global API routing market.
Chinese contentStepFun Step 5 Preview 发布当天获华为 Ascend 等 4 家国产芯片支持
StepFun 新模型一开源，四家国产芯片当天就能跑，还搭上了华为 1024 卡的 Atlas 950 超节点，国产算力生态这块值得看看。
Chinese contentStepFun Step 5 Preview 上线 FeatherlessAI 平台
StepFun 把 Step 5 Preview 放上了 FeatherlessAI，开发者不用自建部署就能直接调用，成本还算友好。
StepFun releases Step 5 Preview, a 600B open-weights MoE model
The claim of 24-hour agent endurance points at long-horizon automation rather than chat benchmarks, and the near-8K tokens/sec/GPU throughput figure shows quantised inference on GB300 is becoming a default release channel. Builders deploying open-weights agents can start from the SGLang or vLLM recipes. StepFun's open release also gives ASEAN teams an alternative to closed frontier APIs for self-hosted workloads.
Chinese contentStepFun 开源 Step 5 Preview：600B 稀疏 MoE，权重已上线 Hugging Face
StepFun 把 600B 的 Step 5 Preview 权重直接开源了，1M 上下文还带视觉输入，搞智能体和长文档的可以去 Hugging Face 下载试试。
Chinese contentStepFun 开放 Step 5 Preview 权重：600B 总参数、27B 激活、1M 上下文
StepFun 把 Step 5 Preview 权重直接开放了，600B 参数只激活 27B，还能跑 1M 上下文，技术博客把 92 层结构和 Sparse GQA 都讲清楚了，自己部署的可以看看。
Chinese content阶跃星辰开源 Step-5-Preview：600B 参数、100 万上下文
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。
