JP

Researcher. Previously @MATSprogram. All opinions are my own.

[JP @riverapablojuan]

🤷
https://t.co/HOfecxIPu8

[marcootie @marcus_nft]

@riverapablojuan Why do you have less than 250 followers but @pmarca follows you

[Bernt Bornich @BerntBornich]

Introducing NEO’s 25 Degrees of Freedom, tendon-driven hands — nearing or surpassing human-level dexterity, strength, speed, and reliability.

For seventy years, robotics worked around the hand problem. The humanoid bet is the reverse: it lives or dies at the fingertips.

[Cranky Federalist @CrankyFed]

Your pub's flag isn't on the moon

[alexlindsay @alexlindsay]

If you want to understand American optimism…

We celebrate the date that we declared independence, not the date that we achieved it.

[Aella @Aella_Girl]

the more i learn about history, the more I appreciate America. America is actually an extremely cool and special anomaly in the timeline of civilizations. It's so successful that it's allowed the people inside it to lose touch with how bad things can truly be

[Anthropic @AnthropicAI]

We’ve received notice that the Department of Commerce has lifted export controls on Claude Fable 5 and Mythos 5.

We'll begin restoring access tomorrow, and will share an update soon.

We’re grateful to our users for their patience, and to everyone who worked with us on redeploying the models.

[Tiffany Fong @TiffanyFong]

Japan is our greatest ally.

[Matthew Botvinick @mattbotvinick]

We're building a team at @Anthropic focusing on AI and the rule of law. We've made our first hires, and are now opening up a new research engineer role. We're looking for people with advanced technical skills, including AI/deep learning/NLP, full-stack development and data science, paired with training or experience in law, government, political science, or a related field. If this is you, or a friend, please get in touch.
https://t.co/uZQEZC5lck

[METR @METR_Evals]

OpenAI gave METR early access to GPT-5.6 Sol for testing including raw chain-of-thought, a railfree version of the model, and internal information about the model. With this access, METR conducted a pre-deployment evaluation of GPT-5.6 Sol, including an attempted measurement of its 50%-Time Horizon. However, the measurement depends heavily on our treatment of cheating attempts, and GPT-5.6 Sol’s detected cheating rate was higher than any public model we have evaluated.

[Charles Maddock @charles_maddock]

New LLM benchmark just dropped

[Arthur Conmy @ArthurConmy]

I'm joining Anthropic!

I'll start work on aligning upcoming models as they’re trained

Claude's capabilities are extraordinary. But like all models thus far, Claude isn’t aligned enough to safely delegate AGI development to

I can't think of a better place to work on this at

[Rosie Campbell @RosieCampbell]

We're hiring a Head of Operations at @eleosai.

Are you the kind of person who can juggle many different things and never drop a ball? Do you want to work at an org focused on (IMHO) the most interesting question of our time? Join us!

Berkeley · full-time · $184K–$277K · Apply by June 30

(details below)

[JP @riverapablojuan]

@Bee_Yaah Wait this is amazing, I didn’t know
🇲🇽🤝🇯🇵

[JP @riverapablojuan]

@dylan522p I love how niche this is

[Anthropic @AnthropicAI]

The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.

The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance.

Access to all other Claude models is not affected.

We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible.

Read our full statement: https://t.co/bwn0sximKZ

[JP @riverapablojuan]

I feel like we are going to need future evals for an LLM’s ability to successfully model another LLM it’s working with.

[JP @riverapablojuan]

Ok, Fable feels different.

[JP @riverapablojuan]

@ScottHarvey014 Sorry to hear this, I’ve had a family member who had cancer before. I’ll be rooting for you 👍

[Paul Graham @paulg]

LinkedIn was already slop. All that's changed is that it's now AI slop.

[Rohin Shah @rohinmshah]

With @schmidtsciences, @coop_ai, @ARIA_research and @Googleorg, we're launching a funding call for multi-agent AI safety. As AI scales, we'll move from models in isolation to complex ecosystems of interacting agents. This creates new risks that we need to solve.

[Deniz Birlikci @denizbirlikci]

Fable 5 has the most impressive inference-time scaling curve in FrontierCode Diamond.