| Classification | | |
| ‘accuracy’ | metrics.accuracy_score | |
| ‘balanced_accuracy’ | metrics.balanced_accuracy_score | |
| ‘average_precision’ | metrics.average_precision_score | |
| ‘neg_brier_score’ | metrics.brier_score_loss | |
| ‘f1’ | metrics.f1_score | for binary targets |
| ‘f1_micro’ | metrics.f1_score | micro-averaged |
| ‘f1_macro’ | metrics.f1_score | macro-averaged |
| ‘f1_weighted’ | metrics.f1_score | weighted average |
| ‘f1_samples’ | metrics.f1_score | by multilabel sample |
| ‘neg_log_loss’ | metrics.log_loss | requires predict_proba support |
| ‘precision’ etc. | metrics.precision_score | suffixes apply as with ‘f1’ |
| ‘recall’ etc. | metrics.recall_score | suffixes apply as with ‘f1’ |
| ‘jaccard’ etc. | metrics.jaccard_score | suffixes apply as with ‘f1’ |
| ‘roc_auc’ | metrics.roc_auc_score | |
| ‘roc_auc_ovr’ | metrics.roc_auc_score | |
| ‘roc_auc_ovo’ | metrics.roc_auc_score | |
| ‘roc_auc_ovr_weighted’ | metrics.roc_auc_score | |
| ‘roc_auc_ovo_weighted’ | metrics.roc_auc_score | |
| Clustering | | |
| ‘adjusted_mutual_info_score’ | metrics.adjusted_mutual_info_score | |
| ‘adjusted_rand_score’ | metrics.adjusted_rand_score | |
| ‘completeness_score’ | metrics.completeness_score | |
| ‘fowlkes_mallows_score’ | metrics.fowlkes_mallows_score | |
| ‘homogeneity_score’ | metrics.homogeneity_score | |
| ‘mutual_info_score’ | metrics.mutual_info_score | |
| ‘normalized_mutual_info_score’ | metrics.normalized_mutual_info_score | |
| ‘v_measure_score’ | metrics.v_measure_score | |
| Regression | | |
| ‘explained_variance’ | metrics.explained_variance_score | |
| ‘max_error’ | metrics.max_error | |
| ‘neg_mean_absolute_error’ | metrics.mean_absolute_error | |
| ‘neg_mean_squared_error’ | metrics.mean_squared_error | |
| ‘neg_root_mean_squared_error’ | metrics.mean_squared_error | |
| ‘neg_mean_squared_log_error’ | metrics.mean_squared_log_error | |
| ‘neg_median_absolute_error’ | metrics.median_absolute_error | |
| ‘r2’ | metrics.r2_score | |
| ‘neg_mean_poisson_deviance’ | metrics.mean_poisson_deviance | |
| ‘neg_mean_gamma_deviance’ | metrics.mean_gamma_deviance | |