Training Verifiers To Solve Math Word Problems

Cobbe Karl, Kosaraju Vineet, Bavarian Mohammad, Chen Mark, Jun Heewoo, Kaiser Lukasz, Plappert Matthias, Tworek Jerry, Hilton Jacob, Nakano Reiichiro, Hesse Christopher, Schulman John. Arxiv 2021

[Paper]    
Model Architecture Pretraining Methods Reinforcement Learning Training Techniques Transformer

State-of-the-art language models can match human performance on many tasks, but they still struggle to robustly perform multi-step mathematical reasoning. To diagnose the failures of current models and support research, we introduce GSM8K, a dataset of 8.5K high quality linguistically diverse grade school math word problems. We find that even the largest transformer models fail to achieve high test performance, despite the conceptual simplicity of this problem distribution. To increase performance, we propose training verifiers to judge the correctness of model completions. At test time, we generate many candidate solutions and select the one ranked highest by the verifier. We demonstrate that verification significantly improves performance on GSM8K, and we provide strong empirical evidence that verification scales more effectively with increased data than a finetuning baseline.

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