OpenAI lost executives, achieved a historic valuation, and started the transition to a for-profit company in 2024.Justin Sullivan/Getty ImagesOpenAI reached new funding and valuation heights in 2024.The ChatGPT maker also saw longtime employees depart and a legal fight with Elon Musk.Here are the biggest moments from OpenAI's roller-coaster year.OpenAI cemented its place as the most valuable name in artificial intelligence in 2024 — and set itself up for more growth.