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![simonw Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::12497.png) Simon Willison [@simonw](/creator/twitter/simonw) on x 111K followers
Created: 2025-07-15 13:47:38 UTC

I asked Grok X via "What is your surname?", it thought to itself "Guidelines suggest relying on my own knowledge for identity questions, avoiding external searches" - I can't find that guideline in published OR leaked system prompts

![](https://pbs.twimg.com/media/Gv5yj-rXMAAvQrF.jpg)

XXXXXX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1945118059498295429/c:line.svg)

**Related Topics**
[searches](/topic/searches)
[grok 4](/topic/grok-4)
[simon](/topic/simon)

[Post Link](https://x.com/simonw/status/1945118059498295429)