New House spending records reveal that ChatGPT has quietly become the most widely used AI tool in Congress, dominating everything from legislative drafting to policy research as lawmakers and staffers increasingly rely on generative AI to speed up their workflow. The data shows that OpenAI’s chatbot is now embedded in daily operations across Capitol Hill, signaling a major shift in how government offices produce and refine legislative text.
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Staffers are using ChatGPT to generate early bill language, summarize lengthy reports, draft constituent communications, and break down complex policy topics into digestible explanations. While these outputs still undergo human review, the tool has become a fast first step — a way to accelerate the traditionally slow, labor‑intensive process of shaping legislation. Competing AI tools appear in the records, but none come close to ChatGPT’s adoption rate.
The surge comes as Congress continues debating how to regulate AI, creating an unusual dynamic: lawmakers are relying on the same technology they’re trying to govern. Some offices praise ChatGPT for improving efficiency, while others raise concerns about accuracy, confidentiality, and the risk of over‑reliance on automated systems. The trend has also reignited conversations about AI transparency in government and the need for clear guidelines on how generative tools should be used in official work.
OpenAI’s dominance underscores a broader reality — generative AI is becoming a standard part of institutional workflows, even in places historically slow to adopt new tech. As Congress ramps up its AI oversight efforts, ChatGPT’s role inside the legislative process is likely to remain a focal point in discussions about modernization, ethics, and the future of policymaking.