DeepSeek-V3 and r1 Found to Contain Anomalous Tokens Causing Bizarre Behavior

teortaxesTex · x · 2026-08-21

Research identifies "anomalous" or "glitch" tokens in DeepSeek-V3 and r1 that induce bizarre behavior, similar to the SolidGoldMagikarp phenomenon in GPT-2/3. The study utilized DeepSeek's tokenizer to extract vocabulary and automatically test for unusual outputs. The model's extensive Chinese training data complicates tokenization, leading to split characters and decoding difficulties.

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