What is known about Anthropic’s decision to abandon its approximately $6 billion acquisition of Israeli founded AI compute efficiency startup Decart after completing due diligence—including when negotiations began, what Decart develops, its funding and expected role at Anthropic,

Anthropic has reportedly ended its pursuit of Decart after extended negotiations and due diligence, abandoning what would have been its largest known acquisition at roughly $6 billion. The reporting supports a strategic change in ownership plans—not a retreat from compute expansion: Anthropic is simultaneously committing heavily to additional cloud capacity ahead of a planned IPO. 1313

• Timeline and status: The proposed deal became public on August 12–13, when sources said Anthropic was in talks to buy Decart for about $6 billion; reporting on September 8 said that, after protracted negotiations and due diligence, Anthropic decided not to proceed. Public reporting does not establish the exact date talks began, only that they had been lengthy by the time they ended. 1213

• What Decart does and why it mattered: Decart develops software intended to make AI chips work more efficiently, reducing the cost of training and operating AI models. That made it a logical prospective fit for Anthropic: its technology could have lowered the economics of serving and training Claude at large scale. 2

• Company and financing: Decart was founded in 2023 by Israeli brothers Dean and Orian Leitersdorf, along with Moshe Shalev. It had Nvidia backing, although the currently available reliable reporting does not establish a single definitive total-funding figure. 81
  The expected role at Anthropic was therefore principally an infrastructure/efficiency capability, rather than a consumer-product acquisition; the reported transaction would have been Anthropic’s largest known purchase. 2

• Why it collapsed: The specific findings of due diligence, valuation disagreement, technology concerns, or other decisive terms have not been publicly disclosed. Reports say Anthropic ultimately declined to buy Decart after reviewing its business and technology, but neither company publicly explained the decision. Thus, claims that a particular problem killed the deal are speculative. 1513

• Potential collaboration: The companies may still work together through a non-acquisition arrangement, such as Anthropic becoming a Decart customer, according to reporting based on people familiar with the matter. No collaboration has been announced. 13

• Infrastructure expansion continues: Days before the deal’s reported collapse, Anthropic signed a $35 billion cloud-computing agreement with Nvidia-backed Lambda to expand AI capacity. The agreement is reported to run six years and use a Texas data-center project developed by Hut 8; separate reporting says Nvidia holds the lease on the site. 35
  That makes the most defensible interpretation that Anthropic still needs vast compute capacity, but has chosen to secure it externally while declining to own Decart outright. The Lambda commitment does not demonstrate why the Decart deal failed. 313

• IPO context: Anthropic confirmed on June 1 that it had confidentially submitted a draft U.S. IPO registration statement/S-1; terms and offering size were not disclosed. 8 Reports have pointed to a possible late-September or October Nasdaq listing, but that timing remains unconfirmed and can change. 10
  Sources also say its eventual prospectus is expected to identify negative public sentiment toward AI and data centers as a risk factor—particularly relevant while it expands physical computing infrastructure. That is a reported prospective disclosure, not yet a publicly available final prospectus risk factor. 7

Overall, the evidence shows a company moving aggressively to lock in compute while preserving flexibility on how it acquires efficiency technology. It does not show that Anthropic has lost interest in Decart’s technology, nor does it reveal a verified reason that the acquisition was abandoned.