Broadcom reportedly guarantees about $30 billion of the debt that leases TPUs to Anthropic

Default and a resale shortfall usually come at the same time ^[7]. A lab that stops paying for more than a gigawatt of compute ^[10] has most likely lost the demand that justified the chips. The repossessed TPUs ^[6] would then be sold into the same weak market. Crypto Briefing says the guarantee pays out if chips lose value faster than expected, or if newer generations make older TPUs worth less ^[12]. In effect, Broadcom has guaranteed Anthropic's credit and used-chip prices together, on $30 billion to $31 billion of senior debt ^[16][2].

The account implies the senior tranches sit inside the roughly $35 billion package ^[5]. If so, Broadcom stands behind 86% to 89% of it, and the paper below the guarantee comes to $4 billion to $5 billion ^[21]. The senior lenders are mostly lending against Broadcom. The account does not say who holds the junior pieces, what Broadcom is paid for the guarantee, or what the leases cost each year.

It is clearer what each party avoids. Broadcom writes no check up front, and it had paid nothing as of filings later in 2026 ^[9]. In return it keeps orders flowing to the TPU design work it does with Google ^[8]. The guaranteed senior debt is about one year of Anthropic's end-2026 run rate ^[22], and that run rate rose roughly 3.3-fold over 2026 ^[18].

The size could still move in three ways. The X post Crypto Briefing cites put Broadcom's commitment at up to $42 billion ^[1], which is $11 billion to $13 billion above the first-deal figures ^[13]. That gap suggests either a cap that covers more than the first deal or a wrong number. Some disclosures go the other way and cap exposure near $29 billion ^[2]. The largest version is the expansion. If the August talks close with the backstop attached ^[3], Broadcom's contingent exposure would reach $90 billion to $101 billion, about three times the first deal ^[19][20]. The platform behind it targets more than 20 gigawatts by 2028 ^[11].

I think the roughly $30 billion first deal is the figure to underwrite today. The expansion is what would turn a guarantee for one customer into a book of AI-lab credit. Two findings would weaken that view. One is a Broadcom filing showing a narrower trigger than default plus a resale shortfall. The other is older TPUs keeping their resale value as new capacity arrives, including the roughly 3.5 gigawatts Broadcom and Google committed to Anthropic from 2027 ^[14].