TL;DR:

• The Pentagon’s 2027 budget request includes over $54 billion for the newly-created Defense Autonomous Warfare Group, a roughly 24,000% increase on the previous year and over half the UK’s entire defence budget.
• Former AI Security Institute official Peter Wallich warned that every frontier model the AISI tested in December had exploitable safeguard failures — a direct UK-traceable concern that will carry into MoD procurement conversations.
• The scale of the commitment cements autonomous warfare as a structural AI-demand segment, likely pulling UK defence primes and AI labs toward deeper US alignment at a politically sensitive moment.

The Pentagon has requested more than $54 billion in its 2027 budget for the Defense Autonomous Warfare Group, a newly-created department focused on drones, autonomous systems and the “Drone Dominance” programme. Former CIA director David Petraeus described the figure as “the largest single commitment to autonomous warfare in history”. For comparison, the entire UK defence budget is less than twice that amount.

The AI-safety tension

The scale comes despite unresolved concerns about model reliability in adversarial settings. Peter Wallich, a former UK AI Security Institute official who now advises MIT’s AI Risk Initiative, told the Guardian that every frontier AI system the AISI tested in December 2025 had exploitable safeguard failures — the same AISI that is currently evaluating Anthropic’s Claude Mythos under the same methodology. Jeffrey Ladish, a former Anthropic security researcher, said autonomous systems could change the dynamics of military confrontation by making coups easier to achieve.

Anthropic itself has been in a months-long dispute with the Pentagon over terms that would prohibit its models being used for mass surveillance or fully autonomous lethal weapons. The DoD’s budget overview explicitly reiterates a commitment to “the latest models from the top American frontier AI labs” — a direct signalling of intent to press that point.

The UK supply-chain angle

For UK AI and defence suppliers, the commitment creates gravitational pull in two directions. Established primes such as Palmer Luckey’s Anduril and startups including Neros, Skydio and Powerus are positioned to absorb a large share of the spend, tightening the US-centric autonomy stack. UK drone-tech firms have historically been funded at a fraction of their American counterparts — the announcement will pressure HMG to either match the signal with the Ministry of Defence’s own autonomy commitments or accept deeper reliance on US-owned capability. The Palantir £240 million MoD contract signed last year already demonstrated how quickly that alignment can deepen.

Looking forward

A credible US military doctrine for autonomous formations has not yet been published — Petraeus’s opinion piece explicitly called that gap out. Until it exists, most of this spend risks being absorbed by procurement rather than deployed capability. UK defence buyers should track two near-term signals: whether the AISI publishes a consolidated frontier-model safeguard-failure report this quarter, and whether HMG’s autumn defence review contains a matching autonomy budget line. Neither is guaranteed.