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+---
+title: What is recency bias in LLMs
+authors:
+  - Patrik Björklund
+share: true
+date: 2024-03-23 09:09:00 +0200
+summary: Prioritizing recent inputs over older ones
+tags:
+  - AI
+  - what-is
+series:
+  - What-Is
+---
+Recency bias in language models like ChatGPT refers to the model's tendency to prioritize more recent inputs in the conversation when generating responses. This means that if you provide a long conversation history, while the model technically considers the entire input, it might weigh recent messages more heavily than earlier ones when generating a response. This can lead to situations where the model might not remember or refer back to earlier parts of the conversation correctly.
+
+Related concepts are "needle in haystack" and that models tend to prioritize the beginning and end of inputs, "ignoring" the middle. This was a huge thing for Googles most recent Gemini models, being able to overcome this in hundred of thousand lines long contexts.
+