While scores at the top of ARC-AGI v1/2 are topping out at 95% there is still a lot the benchmark tell us about efficiency
Not only does GPT-5.6 Sol get 92.5% on ARC-AGI-2 (sota) but it does so at 1 OOM less cost than GPT-5.5 Pro(!)
GPT-5.5 Pro came out 3 months ago...