{ "tiers_by_split": { "train": { "easy": 17568, "hard": 2789, "medium": 7132 }, "dev": { "medium": 56, "hard": 34, "easy": 60 }, "eval": { "hard": 55, "easy": 89, "medium": 106 }, "stress": { "medium": 56, "easy": 58, "hard": 36 } }, "first_step_families": [ [ "alkylation / SNAr", 8130 ], [ "one-reactant FGI", 6764 ], [ "other", 4153 ], [ "amide/ester coupling", 3945 ], [ "reductive amination", 1574 ], [ "Suzuki-type coupling", 1473 ], [ "sulfonylation", 950 ], [ "Boc deprotection", 625 ], [ "urea / carbamate", 244 ], [ "Boc protection", 219 ] ], "points_rate": { "three_steps": 0.517, "four_plus_steps": 0.195, "no_close_train_target": 0.01, "uncommon_first_step": 0.243, "rare_leaf": 0.212 } }