OpenAI is done renting its future from Nvidia. The company announced a partnership with Broadcom to develop custom AI accelerators specifically optimized for large language models, with a deployment target stretching from the second half of 2026 through the end of 2029.
The scale is staggering: 10 gigawatts of custom AI accelerators.
What the partnership actually looks like
The division of labor here is clean. OpenAI handles accelerator design, bringing its deep understanding of LLM workloads directly into the silicon architecture. Broadcom takes responsibility for development, manufacturing, and deployment of those systems, integrating them with its own Ethernet networking technology.
This isn’t OpenAI’s first flirtation with custom chips. Reports surfaced in September 2025 that the company was working with Broadcom on an “XPU” accelerator chip earmarked for 2026 production. The October 13 announcement confirms and massively expands that effort.
