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Cerebras 發布第四代 AI 推理系統 CS-4:性能翻倍,功耗翻倍,部署更靈活

2026-08-19 10:38:29

ChainCatcher 消息,Cerebras 本週發布第四代 AI 推理系統 CS-4,基於同款 5nm WSE-3 晶圓,通過翻倍時鐘頻率和功耗實現性能翻倍。單個 CS-4 機櫃容納 3 顆晶圓(CS-3 為 2 顆),採用模組化"背包"設計簡化製造與部署,TDP 約 125 至 135kW。CS-4 可提供近 4000 token/秒/用戶的推理速度,約為 CS-3 的兩倍,並支持與 AMD、AWS Trainium 等異構系統進行分解推理。

Cerebras 宣稱 CS-4 提供約 2000 倍於英偉達 Rubin 的片內內存帶寬(43PB/s),但 44GB SRAM 容量未變,長上下文推理仍需多晶圓堆疊。以 DeepSeek V4 Pro(1.6T 參數)為例,1M 上下文窗口下需約 20 套系統,256 並發下需約 40 套系統,對應 CAPEX 超 2000 萬美元。Cerebras 正與 OpenAI 等客戶合作,並計劃每年實現約 2 倍性能提升,目標 2027 年實現 20 倍吞吐量增長。CS-4 的"背包"機櫃設計將延續至下一代"Nexus"平台。

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