AI Hardware & SiliconInside Jalapeño: How OpenAI's Custom 3nm ASIC and 15.4 TB/s HBM4 Challenge NVIDIA's Datacenter Grip
At Hot Chips 2026, OpenAI revealed full architectural details of Jalapeño — a 700W custom inference processor built with Broadcom that delivers 1.5x–1.9x throughput/kW and cuts latency up to 3.6x compared to Blackwell.




