Scaling American manufacturing
of AI

Flex and Cerebras are expanding their partnership to build the CS-3 in Milpitas, California — supporting an anticipated 7× increase in production as demand for AI infrastructure accelerates.

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Building AI infrastructure in Silicon Valley

The CS-3 is one of the world’s most advanced AI systems — designed, assembled, integrated, and tested in the heart of Silicon Valley.

~7x

Anticipated increase in CS-3 production
capacity in 2026

Milpitas, CA

Built in the heart of Silicon Valley

58x

WSE-3 is 58x larger than the leading GPU

Up to 15x

faster Inference than GPU

What the expansion delivers

Multiple parallel lines bring more CS-3 systems through integration and testing at once.

The CS-3 is unlike any computer system ever built, and scaling its production requires an extraordinary manufacturing partner. Flex brings the technical depth, operational rigor, and manufacturing expertise needed to support that scale.

Dhiraj Mallick

Chief Operating Officer, Cerebras

With the ideas and vision that Cerebras brings, and the manufacturing expertise, power, and integration skills that Flex brings, this partnership will last well into the future.

Rob Campbell

President, Communications, Enterprise and Cloud Business

Unlike any super computer ever built

Built on Cerebras' wafer-scale engine architecture, the CS-3 uses a processor physically larger than any conventional AI chip — integrated into a platform designed for large-scale AI training and inference.

Challenges rarely seen in server production

Flex engineers worked closely with Cerebras to develop dedicated assembly flows, automated test stations, and new manufacturing methodologies tailored to wafer-scale computing.

Specialized handling processes for wafer-scale hardware
Custom tooling and precision calibration
Dedicated assembly flows and automated test stations
Extensive system-level validation and qualification

Every stage of the manufacturing process — from mechanical integration to thermal validation and final system qualification — required deep collaboration between our engineering teams.

Rob Campbell

President, Communication, Enterprise & Cloud, Flex

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Scaling American manufacturing
of AI

Flex and Cerebras are expanding their partnership to build the CS-3 in Milpitas, California — supporting an anticipated 7× increase in production as demand for AI infrastructure accelerates.

Building AI infrastructure in Silicon Valley

~7x

Milpitas, CA

58x

Up to 15x

What the expansion delivers

New assembly & integration

Advanced test infrastructure

Skilled California workforce

Specialized Wafer-Scale Manufacturing

The CS-3 is unlike any computer system ever built, and scaling its production requires an extraordinary manufacturing partner. Flex brings the technical depth, operational rigor, and manufacturing expertise needed to support that scale.

With the ideas and vision that Cerebras brings, and the manufacturing expertise, power, and integration skills that Flex brings, this partnership will last well into the future.

Unlike any super computer ever built

Challenges rarely seen in server production

Build the fastest & smartest apps

Scaling American manufacturing of AI

Flex and Cerebras are expanding their partnership to build the CS-3 in Milpitas, California — supporting an anticipated 7× increase in production as demand for AI infrastructure accelerates.

Building AI infrastructure in Silicon Valley

~7x

Milpitas, CA

58x

Up to 15x

What the expansion delivers

New assembly & integration

New assembly & integration

Advanced test infrastructure

Advanced test infrastructure

Skilled California workforce

Skilled California workforce

Specialized Wafer-Scale Manufacturing

Specialized Wafer-Scale Manufacturing

The CS-3 is unlike any computer system ever built, and scaling its production requires an extraordinary manufacturing partner. Flex brings the technical depth, operational rigor, and manufacturing expertise needed to support that scale.

With the ideas and vision that Cerebras brings, and the manufacturing expertise, power, and integration skills that Flex brings, this partnership will last well into the future.

Unlike any super computer ever built

Challenges rarely seen in server production

Build the fastest & smartest apps

Scaling American manufacturing
of AI