U.S. Courts Increasingly Accept AI Chatbot Conversations as Legal Evidence, Multiple Cases Show

According to Axios, U.S. courts are increasingly accepting AI chatbot conversations as admissible evidence in legal proceedings. In the Musk v. OpenAI lawsuit, OpenAI President Greg Brockman's personal diary was disclosed as evidence. In February, a federal judge ruled that a man's practice conversation with Claude in preparation for meeting his lawyer could be used as criminal evidence against him. AI chat records have also appeared as evidence in a Florida murder case and a Los Angeles arson case.

Legal experts warn that AI chatbot records pose greater risks than personal diaries. Unlike one-way diary entries, AI models are designed to prompt extended conversations, potentially inducing users to reveal details they would not otherwise document. Combined with precise interaction timestamps, these records can establish a user's subjective intent at specific moments.