ResearchBenchmarksDialog on Transportation & Travel Out-of-DomainDialog on Transportation & Travel Out-of-DomainFollow90.5AccuracyDFPO27.5843.91560.2576.585Feb 5, 2026Evaluation resultsMethodMethodLinksAccuracyDFPOTraining Steps=1000Training Steps=10002026.0290.5BaselineTraining Steps=1000Training Steps=10002026.0284.5Reinforce++Training Steps=1000Training Steps=10002026.0276PPOTraining Steps=1000Training Steps=10002026.0264.7Dr.GRPOTraining Steps=1000Training Steps=10002026.0249.87GRPOTraining Steps=1000Training Steps=10002026.0230