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The Once And Future Fable #5
agentic-ai

The Once And Future Fable #5

LessWrong · Jun 30, 2026, 9:50 PM

We, or at least ‘more than 100 American institutions,’ got Mythos back this week. What we the people do not have is Fable or Sol. While we wait for both Claude Fable 5 and GPT-5.6-Sol, today we instead got Claude Sonnet 5. As usual it will take a few days to get a handle on the new model. In this case, Anthropic is representing it as a cheaper and faster version of Opus 4.8, so even though the number says 5 this is a relatively minor development. This post expands the Fable series to cover all further developments this week surrounding the Mythos Moment, and the various aspects of handling our new ad hoc licensing regime and figuring out policy going forward, and other aspects of policy as well. This includes my notes on various rhetoric being pulled out, where I fear I end up saying similar things every so often, because we are doomed to repeat the cycle. I have accepted my role in that, but those are sections many of you can skip, and are marked in italics accordingly as per usual. Table of Contents You Should See The Other Guy. The other guy is the CCP. DeepMind Coders Of The World, Unite. Or get back to work. Your call. Report Your Incidents. Yes, you should probably do that. Good Guy With An AI. You would very much like to stack the deck. Free As In To Give It A Shot. The judiciary as AI regulator. Everything Is Both Speech And Computer. They keep claiming this. Lambs To The Slaughter. Goodbye, Humphrey’s Executor. A Sign Saying Beware Of The Leopard. I never could get the hang of Thursdays. The Once And Present Mythos. Ask if being in a top institution is right for you. What Is To Be Done. Dean Ball offers his thoughts. Distillation. Some people have views very different than my own. What Would Banning Open Source Even Mean. Open Weight Models Are Unsafe And Nothing Can Fix This. You Should See The Other Guy Important context for discussions these days: Daniel Eth (AI Safety): “The U.S. places more restrictions on our frontier AI than China does on theirs.” Ye

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