We introduce GODEL (Grounded Open Dialogue Language Model), a large pre-trained language model for dialog. In contrast with earlier models such as DialoGPT, GODEL leverages a new phase of grounded pre-training designed to better support adapting GODEL to a wide range of downstream dialog tasks that require information external to the current conversation (e.g., a database or document) to produce good responses. Experiments against an array of benchmarks that encompass task-oriented dialog, conversational QA, and grounded open-domain dialog show that GODEL outperforms state-of-the-art pre-trained dialog models in few-shot fine-tuning setups, in terms of both human and automatic evaluation. A novel feature of our evaluation methodology is the introduction of a notion of utility that assesses the usefulness of responses (extrinsic evaluation) in addition to their communicative features (intrinsic evaluation). We show that extrinsic evaluation offers improved inter-annotator agreement and correlation with automated metrics. Code and data processing scripts are publicly available.

这篇论文介绍了 GODEL（Grounded Open Dialogue Language Model），它是一种大型预训练语言模型，用于对话。与以前的模型相比，GODEL 利用了一种新的基于 Grounded 的预训练方法，以更好地支持适应广泛的下游对话任务。实验表明，GODEL 在少样本 Fine-tuning 方式下表现优异，具备更好的实用性和信息传达特征。

GODEL：面向目标导向对话的大规模预训练