Anthropic has decided against acquiring Israeli AI startup Decart, quietly ending one of the most closely watched acquisition sagas of the year, according to a report published by Bloomberg on Tuesday, September 8, 2026. The decision comes after more than three weeks of negotiations that at one point had progressed to advanced drafts of a deal valued at roughly $7 billion.
The collapse marks a striking reversal for a transaction that had appeared close to signing. For readers following our ongoing AI industry coverage, the deal had been framed as a potential landmark: Anthropic's largest acquisition to date and one of the biggest AI startup purchases of the year.
What Bloomberg Reported
According to Bloomberg reporters Shirin Ghaffary and Ryan Gould, Anthropic had been exploring a deal and performed due diligence on Decart, but ultimately walked away. The information came from people familiar with the matter who asked not to be identified discussing private information.
Notably, Bloomberg's sources indicated that the two companies may still pursue other opportunities to collaborate, leaving the door open to a partnership even as the acquisition is off the table. Neither Anthropic nor Decart has issued a public statement on the record confirming or explaining the decision.
From $6 Billion Talks to a Signed-Draft Stalemate
The arc of the deal was unusually fast and unusually public. Bloomberg first reported on August 13, 2026, that Anthropic was in talks to acquire Decart for approximately $6 billion. Israeli outlet Calcalist followed on August 16 with details suggesting the transaction had advanced substantially: the parties were exchanging drafts of an agreement valuing Decart at around $7 billion, with most of the consideration expected to be paid in Anthropic shares rather than cash.
That share-heavy structure was widely read as tying Decart's shareholders to the outcome of Anthropic's widely anticipated public listing. Calcalist reported at the time that the deal could be signed as soon as September, ahead of an IPO expected this month.
The most dramatic detail from the August reporting was the competition for Decart. According to Calcalist, Nvidia had been in advanced negotiations to acquire the startup and is believed to have offered a higher valuation than Anthropic — partly because Nvidia was already an investor in the company. Those talks were halted after Anthropic emerged with its offer, and Decart's founders, Dr. Dean Leitersdorf and Moshe Shalev, together with Sequoia Capital, the startup's largest investor, concluded that Anthropic was the better long-term home despite the richer Nvidia bid.
Four weeks later, the winning bidder has walked.
Why Decart Mattered to Anthropic
Decart specializes in real-time AI inference and compute optimization — the discipline of running trained models faster and more cheaply, which has become a critical pressure point for every frontier lab as usage of AI systems explodes. The startup is best known for pushing the boundaries of real-time generative video models and for infrastructure work that squeezes more performance out of the same silicon.
For Anthropic, whose Claude model family faces escalating inference costs as it scales, bringing that expertise in-house promised a direct attack on serving economics. An acquisition would also have given Anthropic its first development center in Israel, a country with a dense concentration of AI infrastructure and cybersecurity engineering talent.
What the Collapse Says About Anthropic's IPO Runway
The timing is hard to ignore. Bloomberg separately reported on September 3 that Anthropic is finalizing a $15 billion pre-IPO credit facility, and the company reportedly launched Fable 5.1, its latest frontier model, amid a security-focused launch cycle. Walking away from a multi-billion-dollar acquisition weeks before a listing suggests either that due diligence surfaced concerns, that valuation terms could not be reconciled, or that Anthropic's bankers and lawyers advised against absorbing integration risk ahead of a public offering.
Bloomberg's reporting does not specify a reason, and Anthropic has not commented. What is clear is that large AI acquisitions have become structurally complicated: potential targets command nine- and ten-figure valuations on the strength of small teams, and acquirers must weigh antitrust exposure, retention of key researchers, and the volatility of paper-based consideration against the strategic value of the technology.
What Happens to Decart Now
Decart remains an independent, well-capitalized company with Nvidia among its investors and, according to Bloomberg's sources, no shortage of potential alternative arrangements. The prospect of a future commercial collaboration with Anthropic — short of a merger — remains on the table according to the report.
Whether Nvidia revives its earlier interest is an open question. The chipmaker's August talks were reportedly halted specifically because of Anthropic's competing offer, not because Nvidia lost interest. A company that builds the hardware Decart's optimization technology runs on has obvious reasons to keep the startup close.
For now, the episode stands as a reminder that in the 2026 AI land grab, even deals that reach the drafting stage can dissolve without a public explanation — and that the most valuable currency a frontier lab holds going into an IPO may simply be focus.
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