A quietly growing belief in Silicon Valley could have immense implications: The breakthroughs from large AI models — the ones expected to bring human-level artificial intelligence in the near future — may be slowing down.

Since the frenzied launch of ChatGPT two years ago, AI believers have maintained that improvements in generative AI would accelerate exponentially as tech giants kept adding fuel to the fire in the form of data for training and computing muscle.

The reasoning was that delivering on the technology's promise was simply a matter of resources — pour in enough computing power and data, and artificial general intelligence (AGI) would emerge, capable of matching or exceeding human-level performance.