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Cerebras 发布第四代 AI 推理系统 CS-4:性能翻倍,功耗翻倍,部署更灵活

2026-08-19 10:38:29

ChainCatcher 消息,Cerebras 本周发布第四代 AI 推理系统 CS-4,基于同款 5nm WSE-3 晶圆,通过翻倍时钟频率和功耗实现性能翻倍。单个 CS-4 机柜容纳 3 颗晶圆(CS-3 为 2 颗),采用模块化“背包”设计简化制造与部署,TDP 约 125 至 135kW。CS-4 可提供近 4000 token/秒/用户的推理速度,约为 CS-3 的两倍,并支持与 AMD、AWS Trainium 等异构系统进行分解推理。

Cerebras 宣称 CS-4 提供约 2000 倍于英伟达 Rubin 的片内内存带宽(43PB/s),但 44GB SRAM 容量未变,长上下文推理仍需多晶圆堆叠。以 DeepSeek V4 Pro(1.6T 参数)为例,1M 上下文窗口下需约 20 套系统,256 并发下需约 40 套系统,对应 CAPEX 超 2000 万美元。Cerebras 正与 OpenAI 等客户合作,并计划每年实现约 2 倍性能提升,目标 2027 年实现 20 倍吞吐量增长。CS-4 的“背包”机柜设计将延续至下一代“Nexus”平台。

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