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![tetsuoai Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1587601034339561472.png) Tetsuo [@tetsuoai](/creator/twitter/tetsuoai) on x 138.2K followers
Created: 2025-07-26 19:07:15 UTC

Testing Grok X with some gnarly C code for ARMv8.5-A memory tagging. This level of architectural and code analysis is mind-blowing. The model is not even in "Heavy" or "Think Harder" mode.

Custom prompt in comments.

![](https://pbs.twimg.com/amplify_video_thumb/1949183402344935425/img/TnDtg0OKwSA1MlfR.jpg)

XXXXXX engagements

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

[Post Link](https://x.com/tetsuoai/status/1949184760481485031)