GPT-5.5 hallucinates 3x more than MIT-licensed GLM-5.2

The article compares the hallucination rates of GPT-5.5 and MIT-licensed GLM-5.2, revealing that GPT-5.5 exhibits three times more hallucinations than GLM-5.2. This finding is significant for practitioners as it highlights the reliability issues of newer models like GPT-5.5, suggesting that developers may need to implement additional validation mechanisms when integrating such models into applications.