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How To Reduce LLM Hallucinations

Jan 16, 2024 - vellum.ai
The article discusses the issue of hallucinations in Language Learning Models (LLMs), where the model generates false information that appears accurate. To mitigate this, the author suggests three practical methods: advanced prompting, data augmentation, and fine-tuning. Advanced prompting involves guiding the model to better understand the task and desired output, while data augmentation involves equipping the model with proprietary data or external tools. Fine-tuning, on the other hand, is effective when there is a standardized task and sufficient training data.

The author also emphasizes the importance of evaluating these hallucination reduction methods. This can be done by working with human annotators or using another LLM. A testing strategy is proposed, which involves developing a unit test bank, selecting appropriate evaluation metrics, and using the best model for the task. The choice of technique depends on project objectives, available data, understanding of LLM hallucinations, and the team's capability to develop and evaluate these techniques.

Key takeaways:

  • LLM hallucinations, where a language model generates false information, can be reduced using advanced prompting, data augmentation, and fine-tuning.
  • Advanced prompting techniques include instructing the model to avoid false information, few-shot prompting, and chain-of-thought prompting.
  • Data augmentation involves equipping the model with proprietary data or external tools, and fine-tuning requires a large number of high-quality prompt/completion pairs.
  • After implementing these methods, it's important to evaluate their effectiveness using human annotators or another LLM, and to develop a testing strategy to minimize hallucinations.
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