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Weeks after Broadcom

’s stock shot up on the disclosure of a $10 billion customer that analysts said was OpenAI, the two companies have made the partnership official.

OpenAI and Broadcom said Monday that they’re jointly building and deploying 10 gigawatts of custom artificial intelligence accelerators as part of a broader effort across the industry to scale AI infrastructure.

Broadcom shares climbed 9% following news of the deal.