Jim Cramer points to Nvidia and Broadcom as OpenAI’s Astra lifts AI chip bets

OpenAI’s new Astra model release is driving fresh attention on Nvidia and Broadcom, with Jim Cramer saying both chipmakers stand to benefit from the rollout. Astra was trained on Nvidia’s Blackwell chips and is tied to ongoing custom silicon work with Broadcom.

Astra training uses Nvidia Blackwell, with more GPUs coming

OpenAI’s Astra began a phased rollout last week and is being promoted for advances in cybersecurity and computer skills. Nvidia CEO Jensen Huang said Astra training used 100,000 Blackwell graphics processing units, adding, “400K GPUs coming online next.”

Cramer said Nvidia shares were up early Tuesday before reversing and falling 2%, arguing the reaction was unfounded. “The stock that I think you should be buying is Nvidia,” he said on Tuesday’s Morning Meeting.

Broadcom gets a “halo” from OpenAI’s custom chip partnership

Cramer linked OpenAI’s performance to Broadcom’s position as a key custom-silicon partner. OpenAI is one of Broadcom’s most critical custom-silicon customers, and Broadcom also worked with OpenAI on the Jalapeno chip for model inference.

Broadcom shares rose 2.5% on Tuesday. Cramer said the market is looking for both OpenAI and Anthropic to get their financial setups in order as IPO plans move into focus later this year or early 2027.

AI revenue targets and competition for custom chips

Broadcom’s latest earnings included CEO Hock Tan’s multiyear AI revenue targets. Cramer framed progress toward those goals as dependent on OpenAI and Anthropic maintaining momentum, particularly as Alphabet’s Google shifts some custom chip budget to other design partners.

Tan said Anthropic is on track to be Broadcom’s largest custom customer in fiscal 2027 and into fiscal 2028, while OpenAI is projected to rise to No. 2 in fiscal 2028.

Cramer keeps both names in focus despite portfolio changes

Cramer said his view supports holding exposure across the AI chip cycle rather than assuming one winner. He described Nvidia as the “AI chip king” while noting a key risk: Nvidia’s most lucrative customers moving toward custom chip alternatives.

He said he is sticking with Broadcom even after cutting the position roughly in half in late August, citing Broadcom’s role in balancing that risk.

Why it matters

Astra’s rollout is reshaping near-term expectations for AI infrastructure spending, reinforcing the link between OpenAI’s model progress and demand for custom silicon. That connection is central to how investors are pricing Nvidia’s training-led momentum and Broadcom’s inference and partnership-driven pipeline.