I share your opinion on the results, but why would you trust the LLM explanation for why it does what it does?
>...it finally told me that it generated « the most probable » urls for the topic in question based on the ones he knows exists.
smrq is asking why you would believe that explanation. The LLM doesn't necessarily know why it's doing what it's doing, so that could be another hallucination.
Your answer:
> ...I wanted to know if it was old link that broke or changed but no apparently
Leads me to believe that you misunderstood smrq's question.