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Saturday, June 13, 2026 · about a 2 minute read

When the Government Pulls the Plug

Today the big story is not a new model or a . It is about who gets to decide when AI disappears, and how fast that can happen.

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Simon WillisonPolicy
Statement on the US government directive to suspend access to Fable 5 and Mythos 5

The US government, citing national security, ordered Anthropic to cut off access to its Fable 5 and Mythos 5 models. If you use any product built on those models, it stopped working, not because of a bug or a policy update, but because of a government directive you never saw coming. This is the first time most people are seeing just how quickly access to an AI tool can vanish.

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Hacker NewsPolicy
Open source AI must win

A post titled 'Open source AI must win' picked up nearly a thousand upvotes on Hacker News, which is a lot of agreement for a tech crowd that argues about everything. The Fable 5 situation gives that argument a sharper edge: if the model is open and already downloaded, no government directive can flip the off switch.

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Hacker NewsSafety
The Fable 5 Jailbreak Shows Why AI Guardrails Alone Are Not Enough

A write-up on the Fable 5 jailbreak argues that safety guardrails are not enough on their own, and today's shutdown news gives that argument some unintended weight. The lesson for anyone building on top of AI APIs is the same: the guardrail you rely on today might not be there tomorrow, for reasons that have nothing to do with the model itself.

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Hacker NewsTools
Slightly reducing the sloppiness of AI generated front end

A developer published a practical guide to making AI-generated front-end code less sloppy, and 196 people found it worth bookmarking. If you have ever pasted AI-written HTML into a project and winced at the result, this is the kind of hands-on fix that actually saves you time on Monday morning.

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arXiv cs.CLResearch
Localizing Anchoring Pathways in Language Models

Researchers found that a random irrelevant number dropped into a prompt can quietly shift the model's answer, a phenomenon called anchoring. Think of it like a friend who always rounds up to the nearest number you mentioned five minutes ago. You did not ask them to, they do not know they are doing it, and it is not a flaw they can easily be told to stop. It matters because it means the way you word a question, including stray numbers in your context, shapes the answer you get, even when those numbers have nothing to do with the question.

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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

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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