A Canadian AI researcher credited by colleagues with key contributions to OpenAI’s ChatGPT and GPT-4.5 has left the U.S. after a green card application was denied, sparking fresh criticism of America’s high‑skilled immigration system. OpenAI staff said the denial appears tied to paperwork problems from a filing predating her employment at the company; the researcher plans to continue work remotely from Vancouver as the case is reworked. The episode lands amid competing signals from Washington: a broader crackdown rhetoric under President Donald Trump alongside calls from tech-aligned advisers to expand high‑skill visas. Industry leaders warn such cases risk eroding U.S. leadership in artificial intelligence, even as USCIS says employment‑based permanent residency confers broader rights and mobility than temporary visas. USCIS did not immediately comment.































