Valerie retweetledi
Valerie
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Valerie retweetledi

yeah but has anyone received THIS email from the cursor founder that my friend got

khushi suri@khushkhushkhush
maybe it’s just me but i really hate the screenshots of inbound messages from exited founders, with people saying they missed a general wealth opportunity the best CEOs message thousands of people, esp for tech talent. no guarantee you would have joined. also, it’s sad.
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Valerie retweetledi
Valerie retweetledi
Valerie retweetledi
Valerie retweetledi
Valerie retweetledi

@0interestrates If you’re still using agents, you’re falling behind. You need to be using magicians which are like agents but it’s a different word. I have a GH repo that teaches you how to prompt your agent to fully convert themselves into magicians.
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Valerie retweetledi

Fable 5 is the same underlying model as Mythos 5, but with cybersecurity and biology blocks. Mythos is the first model that's made me feel that we've entered the next phase of model progress.
For years, we've talked about cybersecurity / self-improvement / autonomy / model-dominated coding / biology implications of model progress. Some of these are issues to defend against; some are areas to advance. Mythos has made me & our team feel like we've seen the earliest glimpse of the world we've been talking about.
Also, we published a lot of cyber eval results in the system card, including some evals we designed recently, as well as details of safeguards. In most cases, Mythos 5 ~= Mythos Preview. We found it ticked up on the new ExploitBench eval, and we opted to put that in the eval table so people can calibrate/update on advances in cyber capabilities to be prepared for. (We don't want to compete on offensive capabilities and don't try to.) But overall, Mythos 5 is an efficient model, about equal to Mythos Preview in most cases. I'd really like more people to design new security evals! The better models get, the more our limited evals only see a small part of the picture.
In terms of where we go from here, here are some current thoughts:
1/ It's important we get Mythos cyber capabilities to defenders. We just have to do it safely and cautiously. We're working on an expanded trusted access program. We're working with government and industry to do this. I sort of envision the next 1-2 years being a large scale effort to make the world resilient + design & implement new approaches to security.
2/ I think cybersecurity will start merging with AI security and alignment. Let's say you're a defender and you want to use a model -- will it break out of its sandbox? Will it stop where you tell it to stop? This is one reason I'm excited about working on cybersecurity. In the limit, it's the same thing as AI security.
3/ I really want people to develop new evals for... defensive cybersecurity, hardware security, autonomously running a business, advanced biology, and other parts of national security. Our internal eval ship rate is way, way up because Mythos makes it easy to iterate, especially on the engineering aspect of building evals. (Sometimes, we ask new hires to make a new eval on their first day, and another on the next).
I’m excited we’re making this available as Fable 5, because I think the world spending time with the model is the most important way to calibrate.

Claude@claudeai
Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use. Its capabilities exceed those of any model we’ve ever made generally available.
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