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Christian Catalini

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@ccatalini

Founder w/roots in academia. Founder @MIT Cryptoeconomics Lab. Past: Co-Founder & Chief Strategy Officer, Lightspark. Co-Creator, Libra. Head Economist, Meta.
California, USA catalini.com Joined December 2008
6K Following 27K Followers 12K Posts

Latest posts 5

Christian Catalini Verified account @ccatalini
Easy to count the attacks they enable. Harder to count the ones they stopped.
x.com/timhwang/statu…
Tim Hwang Verified account @timhwang 5d
One of the most concerning developments in open-weight AI has been the rise of vendors of "abilterated" models offering cyber capabilities with no guardrails

@joinFAI's FLD is seeking prospective plaintiffs who may have been injured by these systems to support impact litigation
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12 replies 0 reposts 22 likes 1.6K views View on X
Christian Catalini Verified account @ccatalini
Turns out better verification tooling was hiding in plain sight all along…
Rikiya Takehi @rikiyatakehi 6d
We asked GPT-6 Astra to edit Qwen3.5-0.8B weights to improve math.
It directly changed only 0.016% of weights, fixing 0.8B's reasoning loops & improving math up to 6x and even instruction following 3x, without gradients or training.

We call this Weight-Space Programming: frontier LLMs can now natively read/write neural network weights! 🧵
Blog: rikiyat.github.io/blog/weight-sp…
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7 replies 1 reposts 18 likes 1.8K views View on X
Christian Catalini Verified account @ccatalini
1/ In February, we argued that the cost of execution would fall much faster than the cost of verification. As agents scale, human attention and expertise become the binding constraint.

@AnthropicAI just put experimental evidence behind our warning...
x.com/AlexTamkin/sta…
Alex Tamkin Verified account @AlexTamkin Oct 27
New Anthropic research: How AI agents shape experts' judgment calls

When experts delegate work to an agent, do they still make the key decisions? We tested this in a randomized trial with 50 professional data analysts.
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17 replies 7 reposts 66 likes 6.3K views View on X
Christian Catalini Verified account @ccatalini
Every industry gets to play prisoner’s dilemma. One company blinks. Everyone gets automated.
Brendan (can/do) Verified account @BrendanFoody Oct 23
We’ll pay you up to $100K for every company you refer that licenses its data to @Mercor.

We’ve partnered with > 500 companies so far.

If you know a company with 100+ employees and data in code, gaming, manufacturing, healthcare or professional services, refer them at data.mercor.com/refer.
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