Cerebras WSE-3 deployment pipeline expands — $10B OpenAI deal through 2028 plus AWS Bedrock Trainium replacement now in deployment phase
Cerebras' post-IPO deployment pipeline is now in execution phase. The January 2026 $10B OpenAI agreement to deliver 750 MW of computing power through 2028 is in build-out, and the March 2026 AWS deal to use CS-3 systems for Trainium-powered servers on Amazon Bedrock has shifted into deployment. Cerebras' wafer-scale chips are manufactured exclusively on TSMC 5nm.
The deployment phase is the substantive update. Cerebras spent 2024-2025 closing infrastructure contracts and 2026 first half going public — the May 14 IPO raised $5.55B and valued the company at $95B on day one. The post-IPO phase moves the deal book from announcement to power-on, where the operational risk concentrates. 750 MW for OpenAI by 2028 is the scale-out test; Bedrock Trainium-style deployment is the multi-tenant test.
The TSMC concentration is the supply-chain piece. Cerebras' WSE-3 is a single monolithic wafer-scale chip with 4 trillion transistors and 900,000 cores — TSMC is the only fab in the world that can manufacture it. The wafer-scale architecture removes the inter-chip-networking bottleneck that limits NVIDIA's H100/B200 rack designs but concentrates supply-chain risk in a single TSMC node. For frontier-lab buyers evaluating the second-source story, Cerebras is the most differentiated alternative to NVIDIA hyperscale — and the most TSMC-dependent.
The Register — Cerebras risked it all on dinner plate-sized AI accelerators a decade ago. Today it's worth $66B → · TechCrunch — $60B AI chip darling Cerebras almost died early on, burning $8M a month → · CNBC — AI chipmaker Cerebras files to go public after scrapping IPO plans last year →