OpenAI pairs its Jalapeño AI chips with AMD EPYC Turin hosts

OpenAI is deploying rack-scale systems of its in-house Jalapeño ASIC (application-specific integrated circuit) with AMD EPYC 'Turin' CPUs as host processors. It did not choose newer agent-oriented chips such as Arm's AGI or Nvidia's Vera.

Why it matters: Host CPU choice shows where OpenAI's custom-silicon stack is going: it is betting on proven x86 hosts rather than the new agentic CPU wave. It also gives AMD a data-center win in the same week it claimed its Venice CPUs beat Nvidia's Vera, and signals Nvidia's CPU push faces resistance even from its biggest customers.