Memento 3 Achieves 100% on ARC-AGI-3 Benchmark with Reflective Rulebook World Model

Memento 3, an AI system, has successfully cleared all 25 public ARC-AGI-3 games with a 100% mean RHAE, utilizing a natural-language rulebook and a continually refined world model. This benchmark result significantly outperforms previous models, including Claude Opus 5, demonstrating advanced reasoning capabilities and efficient learning with minimal actions.