tl;dr: Apple has sued OpenAI, io Products, and two former Apple employees—ex-VP of product design Tang Tan and engineer Chang Liu—alleging they stole trade secrets to benefit OpenAI's hardware efforts led by Jony Ive. The complaint claims Tan used insider knowledge to extract confidential info from Apple job candidates (including asking them to bring actual parts and CAD files to interviews), while Liu allegedly exploited a security bug to download thousands of pages of engineering documents. Apple says over 400 former employees now work at OpenAI and calls the alleged misconduct "the tip of the iceberg."