Maia 300: Microsoft Builds the Exit From a Compute Landlord Model It Helped Finance

The Shift From Borrower to Builder

Microsoft is no longer content to finance the dominance of the chipmakers it depends on. The company that paid Anthropic’s largest cloud bills and sat inside the Broadcom-orchestrated financing web that we traced through Post 131186 and Post 131806 just unveiled its own silicon at the OCP Global Summit. The Azure Maia 300, announced by Scott Guthrie, Microsoft’s EVP of Cloud+AI, via the company’s blog on October 12, 2026, is not a token effort. On vendor-reported specs, it outperforms NVIDIA’s Blackwell B200 on dense FP8 compute, matches the B300’s memory capacity, and delivers more than double the bandwidth at lower power.

What the Specs Actually Say

The Maia 300 is built on TSMC’s N2P process, a 2nm-class node, with a multi-chiplet design and I/O chiplets on a separate 3nm process. According to vendor-reported figures shared through the Microsoft blog and confirmed via secondary reporting by CNBC,