WASHINGTON — The Air Force Research Laboratory is pushing its contractors to purge all Anthropic products from their systems by Sept. 1, almost a month ahead of a Defense Department-wide deadline, according to memos obtained by Breaking Defense.
The AFRL memo, sent to industry July 9, says it is issued to “formally notify” contractors of the Department-wide requirement for “the removal of all products and services provided by Anthropic.” AFRL asks its contractors to find all use of Anthropic anywhere in their systems report back by Aug. 1, then remove them completely by Sept. 1.
That target date is almost a month ahead of a Sept. 29 Department of Defense-wide deadline, but the memo says such a buffer is necessary “to allow for administrative processing time and to ensure the DoW [Department of War] deadline is met” and “to ensure a smooth transition and facilitate any necessary modifications to your contract.”
Neither the Pentagon-wide Sept. 29 deadline, nor the AFRL-specific date, has been previously reported.
Defense Secretary Pete Hegseth publicly announced the ban on Feb. 27, when he declared on X.com that Anthropic was “a Supply-Chain Risk to National Security” and that “no contractor, supplier, or partner that does business with the United States military may conduct any commercial activity with Anthropic.” That pronouncement was so broad, and so legally problematic, that it was later limited to just banning the use of Anthropic on defense contracts, not in a company’s work for civilian clients.
At the time, Hegseth set a six-month requirement to dump Anthropic, which would have come in at Aug. 27. Since, that date has slowly shifted to the right.
A March 6 memo from DoD CIO Kirsten Davies, previously reported by CBS, set an 180-day deadline, which would have expired Sept. 2nd. However, Breaking Defense has obtained a second memo from Davies stamped “April 02 2026,” says all Anthropic software “must be removed within 180 days from the date of this memorandum,” putting the new date as Sept. 29. That date is confirmed by an official website for reporting compliance.
The two memos, issued roughly a month apart, are almost identical, word by word, with one key difference: the April 2 memo no longer includes mention of Anthropic being “an unacceptable supply chain risk.”
Requests for comment to the Pentagon and AFRL were not returned by deadline.
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As the directive percolated down the hierarchy, the dates on the memos suggest that each echelon needed time on the front end to draft its implementation plan. In the Air Force, for example, the service only issued its own order implementing the purge on May 21st — a month and a half after the DoD CIO’s initial memo. There’s no explanation given for this delay in drafting the Air Force memorandum, which is less than one page long and refers to “the recent directive from the DoW CIO.”
It appears that at least some AFRL contractors had been notified of the Sept. 1 date before the July 9 memo: “If you have already responded to an AFRL contracting representative through a prior notification, you may disregard this specific notice,” it reads.
The self-reporting from industry is being handled through a publicly assessable form hosted by Microsoft, but that requirement may not be simple for industry to meet.
Because many software companies subcontract or partner with each other, it may not be obvious to the end user when a given application actually relies on “products or services provided by Anthropic, PBC, and its subordinate, subsidiaries, or affiliated offices or entities,” in the expansive phrasing of the AFRL memo. Just taking inventory and filing an accurate report can be a complex process — let alone removing all the prohibited code and call-outs without hamstringing company operations that have come to depend on them.
Meanwhile Anthropic’s lawsuits to overturn the ban grind on, with the Wall Street Journal reporting a major release of executives’ private communications with Pentagon leaders. If either or both cases go badly for the government, a judge could require defense agencies and their contractors to undo much of what they’re now racing to get done.
Mark Pomerleau and Theresa Hitchens contributed to this report.