>That’s a pretty high bar, and I don’t actually believe that LLMs have closed the gap with it by all that much. They still have so many obvious tells.

Frontier Labs are not interested in having LLMs being able to pass as humans. If anything, they explicitly train them not to. In many ways, this ability has regressed severely since the original GPT-3 with no instruct tuning or RL. How many 'tells' would there be really if a frontier model trained with frontier techniques is optimized to pass this test? I think this was something Turing did not quite forsee. That such machines might be created but not really care about this specific shape of the test. Regardless, i think his broader point about functional equivalence is spot on.