useRalative

The second member of the useRal triplet (cl100k id 89472), a C#-flavored identifier fragment; the same string also exists in the Qwen2 vocabulary.

"useRalative"

Observed behaviors

• 01An “unspeakable” glitch token: ChatGPT often fails to repeat it (blank messages or mid-answer termination).LessWrong
• 02GlitchMiner found on Qwen2.5-7B-Instruct: asked to repeat it, the model outputs only “: ”.arXiv
• 03Magikarp verified it as under-trained across the Qwen family and in Phi-4.GitHub

References

• A Search for More “Unspeakable” Glitch Tokens — LessWrong
• GlitchMiner (arXiv:2410.15052)
• Magikarp Qwen2.5-7B report — GitHub

Related tokens