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Justin Angel

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@JustinAngel

AI/ML. Worked at Meta, Uber, Amazon, Apple, and Microsoft building apps, developer platforms, and hardware. Tweeting about LLM psychotherapy.
San Francisco, CA JustinAngel.ai Joined August 2008
437 Following 6.6K Followers 22K Posts

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Justin Angel Verified account @JustinAngel
I gave claude a new physics RL problem to test out Weight-Space Programming.

It vibe coded 298 weights for a 71-layers deep neural-net, correctly one-shotting the problem using weights.

🧵 Here's why it's not "weight space programming"...

x.com/rikiyatakehi/s…
0:23
Rikiya Takehi @rikiyatakehi Nov 2
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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