OpenAI's o1 model might not look like a quantum leap forward, sitting there in GPT's drab textual clothing, looking like just another invisible terminal typist. But it really is a step-change in the development of AI – and a fleeting glimpse into exactly how these alien machines will eventually overtake humans in every conceivable way.

For a wonderful deeper dive into how reinforcement learning makes o1 a step-change in the development of AI, I highly recommend the video below, from the excellent AI Explained channel.