The Senate Sergeant at Arms told aides on Monday, 19 October 2026, that they can now sign up to use Anthropic’s AI assistant Claude for tasks such as generating “initial drafts” and analyzing large data sets, Bloomberg Government reported, citing a notice it obtained. Staff can register for an enterprise version of Claude or apply to switch to it from another Senate-approved tool, such as OpenAI’s ChatGPT or Google’s Gemini.
It comes seven months after the Sergeant at Arms cleared Microsoft Copilot Chat, Google Gemini and ChatGPT Enterprise for use with Senate data in March, when an internal Senate IT site listed Claude among tools still under evaluation, according to Business Insider.
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The key insight: As we read it, the notice turns the Senate’s AI approvals into a choice among vendors: staff can register for Claude or apply to switch to it from ChatGPT or Gemini, Bloomberg Government reported.
Bloomberg Government reports that the notice lets aides “register for an enterprise version of Claude or they can apply to switch over to Anthropic‘s AI assistant if they’re already using another Senate-approved AI tool, such as OpenAI’s ChatGPT or Google’s Gemini.”
Bloomberg Government first reported the plans on 15 October, citing three people briefed on them, and said the move “follows months of hand-wringing by senators and aides about their in-house AI limitations.”
The notice itself has not been published. The readable part of Bloomberg Government’s report gives no price, no licence count and no start date beyond Monday’s sign-up.
Who in Washington can use which AI, from dated notices, orders, filings and reports: the Senate cleared three AI tools in March with Claude still under evaluation (Sergeant at Arms notice, via Business Insider) and added Claude on 19 October (Bloomberg Government); the House approves four, including Claude Pro (POPVOX Foundation); Anthropic says Claude will reach more than 15 Genesis Mission agencies; on the executive side, Trump’s 27 February directive, Judge Rita Lin’s 28 August ruling (FedScoop), the Pentagon’s statement to the BBC and the 19 October DHS order on DeepSeek.
Bloomberg Government posted its report on X at 15:40 UTC on 19 October under the headline โSenate Unveils Claude for Staff, Touting Its Drafting Capacity.โ That report is this pieceโs source for the Sergeant at Arms notice; the notice itself has not been published.
Seven Months From ‘Under Evaluation’
Business Insider published the March notice from the Sergeant at Arms’ Chief Information Officer. It approved three platforms for use with Senate data and said: “Microsoft Copilot Chat is available now for use by all Senate employees at no cost.”
The same notice said the Sergeant at Arms would provide each Senate employee one generative AI licence at no cost for either Google Workspace with Gemini Chat or ChatGPT Enterprise. Business Insider wrote that “Claude was among several AI tools that are still under evaluation.”
In September, NPR reported that Senate staff had access only to those three chat interfaces, and that the Sergeant at Arms had not authorized more advanced agent tools such as Anthropic’s Claude Code and Cowork. The readable part of Monday’s report does not say whether those tools are now included.
The House Moved Earlier
Across the Capitol, the House approved ChatGPT, Copilot, Gemini and Claude for official use, according to the POPVOX Foundation, a nonprofit focused on modernizing Congress. Its March 2026 overview lists “Anthropic Claude Pro” as approved in the House, with permitted uses that vary by data sensitivity.
POPVOX notes that neither chamber has made its AI policy public, and that its overview is based on its own review of those documents.
Why Congress Is a Separate Case
On 27 February, President Donald Trump said he would direct all federal agencies to “IMMEDIATELY CEASE” all use of Anthropic technology, The Guardian reported, after a dispute between the company and the Pentagon. Business Insider wrote in March that the order “does not apply to the legislative branch.”
On 28 August, Judge Rita Lin of the US District Court for the Northern District of California mostly sided with Anthropic, FedScoop reported, writing that “the broad measures imposed on Anthropic were illegal and baseless.”
On 5 October, a Defense Department official told the BBC that the Pentagon “has ceased the use of Anthropic products.” Three days later, Anthropic said it was committing $150 million over three years to the Genesis Mission, with funding going toward making Claude available to more than 15 agencies that are part of the mission.
The Same Day, a Different Order
A Department of Homeland Security order filed for public inspection at the Federal Register on 19 October directs civilian federal agencies to exclude DeepSeek from their procurements and to remove DeepSeek products from their IT systems or seek an exception. The order itself carries an original release date of 24 July 2026. The two moves came from different branches and are not linked in any document we read.
The Structural Read
As we read it, the gap between the chambers has narrowed: the House approved Claude Pro earlier, according to the POPVOX Foundation, and the Senate added an enterprise version of Claude on 19 October, according to Bloomberg Government.
As we read it, Congress is on its own track: Business Insider wrote in March that the February directive on Anthropic does not apply to the legislative branch, and FedScoop reported that a federal judge ruled in August that the broad measures were illegal and baseless.
As we read it, the open question is scope: NPR reported in September that agent tools such as Claude Code and Cowork were not authorized, and the readable part of Monday’s report does not say whether that has changed.
Sen. Bernie Moreno, as reported by NPR, September 2026
“I personally would like to be using it a lot more, but unfortunately the Senate has some crazy rules about how we’re allowed to deploy or not allowed to deploy.”
Three Implications
STAFF GET A CHOICE Aides can register for an enterprise version of Claude or apply to switch to it from ChatGPT or Gemini, Bloomberg Government reported.
AGENT TOOLS ARE UNCLEAR NPR reported in September that more advanced agent tools such as Claude Code and Cowork were not authorized; the readable part of Monday’s report does not say whether they are now.
CONGRESS SETS ITS OWN RULES Business Insider wrote that the February directive on Anthropic does not apply to the legislative branch. Separately, a DHS order filed for public inspection the same day directs civilian agencies to exclude and remove DeepSeek products or seek an exception.
The framework puts it this way: “enterprise vendors don’t sell software anymore—they sell irreversibility.”
As we read it, the Senate notice tests that idea from the buyer’s side: staff who already use ChatGPT or Gemini can apply to switch to Claude, according to Bloomberg Government. The framework was published in December 2025 and does not discuss the Senate.
What Is Not Established
The Senate notice has not been published, so its full terms, including any price, licence limit or security tier for Claude, are not known from the sources we read. The readable part of Bloomberg Government’s report does not say how many aides have signed up.
Neither Anthropic nor the Sergeant at Arms is quoted in the readable part of the report. The House and Senate approvals described here come from the chambers’ internal guidance as reported by Bloomberg Government, Business Insider, NPR and POPVOX, not from public documents.
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The Senate Sergeant at Arms told aides on 19 October that they can sign up for an enterprise version of Claude or switch to it from ChatGPT or Gemini, Bloomberg Government reported. That is seven months after the Senate cleared three other AI tools in March, while Claude was still under evaluation.
A note on sourcing. The 19 October Senate notice was not published; this piece relies on the publicly readable part of Bloomberg Government’s report, which is otherwise paywalled. The March notice is as published by Business Insider; the September account is NPR’s; House approvals are the POPVOX Foundation’s review; the executive-branch history is from The Guardian, FedScoop, the BBC and Anthropic; the DeepSeek order is from the Federal Register filing we reported earlier. The tile chart’s selection is ours. Nothing here is a forecast, and nothing here is financial or investment advice.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
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