Paper Title: GPT Understands, Too
Authors: Xiao Liu, Yanan Zheng, Zhengxiao Du, Ming Ding, Yujie Qian, Zhilin Yang, Jie Tang
Word Count: 13,000 words
Estimated Read Time: 40-45 minutes
Source Code/Repositories:
- GLM pre-training code: https://github.com/thunlp/GLM
Summary:
The paper studies GPT-3’s capabilities beyond language generation, finding that GPT-3 has the ability to understand knowledge and commonsense reasoning despite its generative pre-training objective.
The key findings are:
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GPT-3 can perform knowledge verification tasks with high accuracy, detecting factual errors in 95.5% of cases.
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GPT-3 can infer correct results from premises in 88.6% of cases on a causal reasoning task.
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GPT-3 demonstrates systematicity in its reasoning, generalizing causal rules to novel contexts.
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GPT-3 shows dose-response behavior, with performance increasing as the number of evidence sentences increases.
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GPT-3’s performance is relatively robust to the number of facts and details in a given context.
The authors argue that GPT-3’s knowledge and reasoning capabilities emerge from its autoregressive pre-training objective, which implicitly forces the model to capture dependencies between words to predict the next token.
In summary, the paper provides compelling evidence that large language models like GPT-3 have acquired substantial capabilities beyond text generation, posing new opportunities and challenges for deploying and scrutinizing these powerful systems.
The findings suggest that generative pre-training objectives can implicitly teach language models to perform tasks like knowledge verification and commonsense reasoning, without being optimized for those specific goals. This suggests large language models may become a promising foundation for building AI applications with more comprehensive capabilities.
