Anthropic Walks Away From $6bn Decart Acquisition After Due Diligence

The Quick Take

• Anthropic reportedly walked away from a potential $6 billion acquisition of AI startup Decart after completing due diligence on the deal
• The collapsed deal signals that even AI-native acquirers are applying valuation discipline as premium multiples for early-stage AI firms face increased scrutiny
• Decart, a simulation and world-model AI startup, had attracted significant venture interest before the Anthropic discussions reportedly ended

Anthropic, the Claude AI developer, reportedly walked away from a $6 billion acquisition of AI startup Decart following due diligence, according to Business Times Singapore. The decision to exit after exploring the deal signals that Anthropic applied rigorous valuation scrutiny before passing on what would have been one of the largest AI startup acquisitions of 2026. Decart, which focuses on simulation and world-model AI research, had attracted significant venture capital attention. The walkaway underlines that $6 billion valuations for pre-revenue or early-revenue AI infrastructure companies face a higher bar even from well-capitalized strategic buyers.

The failed acquisition has sector-wide implications for AI startup valuations. Venture-backed AI companies positioned in the simulation and generative world-model space will face increased pressure to demonstrate revenue traction before commanding comparable valuations. Direct AI infrastructure competitors — Google DeepMind, OpenAI, and Meta AI — could now pursue Decart independently or at a reduced valuation, given that Anthropic's exit removes one bidder from a competitive process. Meanwhile, Anthropic's capital — reportedly backed by Amazon's multi-billion dollar commitment — is directed toward organic capability development rather than M&A, shifting its competitive strategy from acquisition to internal build.

Watch whether Decart announces an alternative deal with a different strategic partner in the next 60-90 days, as time pressure following Anthropic's exit often forces startups to renegotiate at lower valuations. Anthropic's Q4 2026 product roadmap disclosures will indicate whether the Claude model family advances in world-simulation or reasoning directions that would have been accelerated by a Decart acquisition. The macro variable is the AI VC funding environment: if enterprise AI spending growth decelerates, high-valuation pre-revenue AI acquisitions become harder to justify, compressing Decart's alternatives and setting a precedent for other large AI startup deal structures.

Synthesized from 1 source.