US regulators have begun investigating tech giants' investments in generative artificial intelligence startups including OpenAI, the creator of ChatGPT (Kirill KUDRYAVTSEV)A top US antitrust regulator on Thursday said it was probing investments made by Microsoft, Google and Amazon into generative AI startups OpenAI and Anthropic. One major concern is that generative AI, which allows for human-level content to be produced by software in just seconds, requires a massive amount of computing power, something that big tech companies are almost uniquely capable of delivering. Microsoft has moved the fastest in the generative AI revolution with a reported $13 billion investment into OpenAI, the creator of ChatGPT. Anthropic, founded by former staff of OpenAI, received major investments from both Google and Amazon last year and is seen as a potential major player in the fast-emerging generative AI sector. Amazon had already announced it aimed to soup up its Alexa voice assistant with generative AI, which the firm said would allow users to have smoother conversations with the device.