Listen to the Context: Towards Faithful Large Language Models for Retrieval Augmented Generation on Climate Questions

• URL: http://arxiv.org/abs/2505.15633v1
• Date: Wed, 21 May 2025 15:17:38 GMT
• Title: Listen to the Context: Towards Faithful Large Language Models for Retrieval Augmented Generation on Climate Questions
• Authors: David Thulke, Jakob Kemmler, Christian Dugast, Hermann Ney,
• Abstract summary: Large language models that use retrieval augmented generation have the potential to unlock valuable knowledge.<n>This approach can help alleviate factual hallucinations by relying on retrieved passages as additional context.<n>We explore the automatic assessment of faithfulness of different models in this setting.<n>We develop ClimateGPT Faithful+, which achieves an improvement in faithfulness from 30% to 57% in supported atomic claims.
• Score: 31.7025759960363
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Large language models that use retrieval augmented generation have the potential to unlock valuable knowledge for researchers, policymakers, and the public by making long and technical climate-related documents more accessible. While this approach can help alleviate factual hallucinations by relying on retrieved passages as additional context, its effectiveness depends on whether the model's output remains faithful to these passages. To address this, we explore the automatic assessment of faithfulness of different models in this setting. We then focus on ClimateGPT, a large language model specialised in climate science, to examine which factors in its instruction fine-tuning impact the model's faithfulness. By excluding unfaithful subsets of the model's training data, we develop ClimateGPT Faithful+, which achieves an improvement in faithfulness from 30% to 57% in supported atomic claims according to our automatic metric.

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