A year ago the closest thing we had to an AI agent was o3.

One year prior to this post, o3 represented the most advanced AI agent available, marking a significant milestone in AI development. The statement reflects how rapidly AI capabilities have evolved, with substantial progress in autonomous agent functionality occurring within a single year. This observation likely highlights the acceleration of AI advancement and the emergence of more capable AI systems beyond o3's capabilities in the intervening period.

Source: Ethan Mollick (X) | 2026-06-08