Elon Musk has dropped a federal lawsuit against artificial intelligence company OpenAI, the maker of the popular ChatGPT software that produces human-like responses to user prompts. The lawsuit’s dismissal was disclosed in a court filing in San Francisco. No reason was provided for dropping the lawsuit, which had sought to prevent OpenAI from breaking its contract by allowing rival Microsoft to obtain key rights to the technology behind ChatGPT. Musk co-founded OpenAI in 2015 but left its board in 2018. The lawsuit alleged that OpenAI breached its contract by allowing Microsoft to invest in the company and obtain a license to commercialize key technologies behind ChatGPT. The dismissal comes as OpenAI is reportedly in talks to sell existing shares at a valuation of around $29 billion.