OpenAI’s ChatGPT Captures 88% of US House AI Spending
Analysis of congressional disbursement records reveals a heavy reliance on a single AI vendor for legislative operations.
OpenAI’s ChatGPT has become the dominant artificial intelligence tool within the US House of Representatives, capturing the vast majority of identifiable AI spending. This concentration of tool usage comes as congressional offices increasingly lean on automation to manage the crushing volume of legislative and constituent data.
According to an analysis of House disbursement records for the 12 months ending March 31, ChatGPT accounted for $100,580 of at least $113,740 in traceable AI vendor payments. The tool represented roughly 88% of total expenditures and 96% of transaction volume, totaling 798 individual transactions. Anthropic’s Claude trailed as the second most used paid tool, with $13,160 spent across 37 transactions. The spending gap also reflects a partisan divide: Democratic member offices spent $54,165 on identified AI purchases, more than three times the $15,782 spent by Republican offices.
The Path to Dominance
The rapid adoption of AI on Capitol Hill is driven by a workforce struggling to keep pace with the increasing volume of material arriving from lobbyists and constituents. OpenAI secured an early advantage through strategic partnerships with the House Digital Service and the Congressional Management Foundation. These collaborations provided essential training and initial access to senior staff and aides. Specifically, the House Digital Service distributed 40 ChatGPT Plus licenses to a cross-party group of aides in 2023, establishing a foundational foothold for the software in daily congressional workflows.
Risks of Vendor Lock-in
This heavy reliance on a single commercial provider raises significant concerns regarding vendor lock-in and the influence of corporate interests on government procurement. The timing of this dominance coincides with a surge in corporate outreach; OpenAI’s lobbying spend reached $1 million in the first quarter of 2026, an 82.5% increase over the same period in 2025.
Industry observers suggest that such a narrow toolset may hinder the legislative process. Eric Petry of the Brennan Center for Justice noted the importance of ensuring taxpayer dollars provide the best available tools rather than rewarding "political favorites." Furthermore, there is a growing concern that legislators may lack the diverse, hands-on experience with various AI systems necessary to draft effective, sector-wide regulations.
The Human Cost
Despite the efficiency gains in drafting memos and summarizing legislation, some argue that the technology is a symptom of a deeper systemic issue. Marci Harris, CEO of the POPVOX Foundation, stated that staffers are "famously overwhelmed" and that AI is actually exacerbating that pressure rather than solving it.
As the House continues to integrate these tools, the focus will likely shift toward whether the government can diversify its AI portfolio or if the current trajectory will cement OpenAI as the primary architect of the legislative branch's digital infrastructure.