OpenAI Unveils Jalapeño Inference Chip; Micron Joins Anthropic's Series H

TL;DR: OpenAI and Broadcom today launched Jalapeño — OpenAI's first custom ASIC, engineered for LLM inference, not training — while Micron completes Anthropic's HBM supply trio with a Series H stake and multi-year supply deal.

OpenAI Jalapeño — the first inference-first chip

OpenAI and Broadcom today unveiled Jalapeño, OpenAI's first custom Intelligence Processor: an ASIC designed specifically for LLM inference from the ground up around OpenAI's model roadmap, kernel stack, and serving systems. Co-developed in 9 months — claimed to be the fastest ASIC development cycle in high-performance semiconductors — with Broadcom handling silicon and Celestica handling rack and board integration. Engineering samples are running GPT-5.3-Codex-Spark in the lab at production target frequency and power.

Key design principle: "reduces data movement," an architecture choice that trades generality for lower memory bandwidth pressure at LLM inference time. OpenAI claims "substantially better performance per watt than current state-of-the-art." Deployment planned for end of 2026, at gigawatt-scale data centers with Microsoft and other partners.

Why it matters: Purpose-built inference silicon could unlock meaningfully lower API latency or cost at scale — and signals that OpenAI is betting on vertical compute integration, not just model quality, as a long-term advantage.

Micron + Anthropic

Announced June 22: Micron joined Anthropic's Series H with a multi-year supply agreement covering HBM, DRAM, and SSDs, plus internal Claude deployment across engineering and agentic workflows. Samsung and SK Hynix had already joined the round (May 28). Anthropic now has all three major HBM suppliers as strategic investors — an infrastructure lock-in unusual even by the standards of frontier AI fundraising.

Why it matters: The full HBM supply trio as equity partners signals how central compute supply security has become to Anthropic's roadmap planning.

Sources: OpenAI: Jalapeño announcement, SiliconAngle: Jalapeño details, Micron/Anthropic press release, DigitalApplied: Micron deal breakdown