OpenAI, the company that launched ChatGPT a year ago, said Friday it had dismissed CEO Sam Altman in a shock firing of a central figure in the AI revolution.

Altman became a tech world sensation with the release nearly a year ago of ChatGPT, an artificial intelligence (AI) chatbot with unprecedented capabilities, churning out human-level content such as poems or artwork in just seconds.

His dismissal caught the tech world by surprise, with rumors rife on social media as to the cause of the sudden sacking.