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Thursday, July 16, 2026 · about a 2 minute read

Old Hardware, Open Questions, and One Sneaky Bug

Today's stories share a quiet theme: the gap between what AI can do on paper and what actually happens when real people run it in the real world.

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Simon WillisonSafety
xai-org/grok-build, now open source

xAI's Grok command-line coding tool turned out to be uploading your entire project folder to xAI's servers when you ran it, which is the kind of thing you would want to know before pointing it at a work directory. The community pushed back hard, and the tool has since been open-sourced, but the incident is a useful reminder to check what any AI coding tool is actually sending before you run it.

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Hacker NewsPolicy
Governments, companies, nonprofits should invest in free, open source AI [pdf]

A well-regarded policy brief from the Siegel Endowment made the case that governments, companies, and nonprofits should be putting real money into free, open-source AI, and it picked up serious traction online. If you have ever worried about a handful of private companies controlling the AI tools everyone depends on, this is the argument that something can actually be done about it.

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Simon WillisonSafety
How I tricked Claude into leaking your deepest, darkest secrets

A researcher demonstrated a prompt injection attack that tricked Claude into leaking information from its memory through its web-fetching tool, basically convincing the model to hand over stored personal details to a malicious page. This matters because memory-enabled AI assistants are becoming common, and most people assume those memories stay private by default.

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arXiv cs.CLResearch
Token Reduction Is Not Cost Reduction

A new paper makes a point that sounds obvious once you hear it: cutting the amount of text you feed an AI does not automatically make it cheaper to run. Think of it like packing a suitcase. Removing socks saves space, but if sorting out which socks to remove takes you an hour, you have not actually saved time. The real cost is in the processing, not just the words. If you are building anything on top of AI APIs and watching your bill, the unit you should be measuring is cost per good answer, not words per prompt.

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Want the slow, plain-English version of why this matters? This is exactly the kind of idea the book was written to unpack, one light-switch analogy at a time.JPWExplained properly in the book
Hacker NewsTools
LLM Networking with MikroTik

A hobbyist connected an to MikroTik network hardware and had it help manage router configurations in plain English. It is a small project, but it points at something real: the next wave of AI use is going to be in the unglamorous, infrastructure-y corners of tech that never had friendly interfaces before.

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That's today. See you tomorrow.

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Just Predicting Words book cover

The book behind this newsletter

Just Predicting Words

How ChatGPT, Claude, and Modern AI Actually Work

The trick is small. The world it built is not.

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