Cerebras Wafer-Scale Engine 3

Name: Cerebras Wafer-Scale Engine 3
Brand: Cerebras

Wafer-scale AI engine: trillions of transistors and hundreds of thousands of cores on a single TSMC 5nm die.

Stylized line drawing of the Cerebras Wafer-Scale Engine 3

WSE-3 is Cerebras' third-generation wafer-scale processor. A single 5nm wafer holds 900,000 AI cores and 44 GB of on-chip SRAM with 21 PB/s of memory bandwidth, delivering 125 PFLOPS of peak AI compute as the engine inside the CS-3 system.

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Specs

compute: Wafer-scale custom (TSMC 5nm)

Wafer-scale dataflow accelerator. Single die holds the entire compute fabric — no off-chip memory hop for inter-core traffic.

Cerebras' chip page now leads with the WSE-3 Turbo, rated at 250 petaflops. On 2026-08-18 Cerebras introduced the CS-4, a rack-scale system built from three WSE-3 Turbo processors, with first shipments due that quarter.