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Lennart Justen

Physics to biology at the MIT Media Lab and Broad Institute. Interested in detecting emerging pathogens earlier and controlling their spread in the built environment. AIxBio sometimes.

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A biosecurity playbook for AI companies

A practical playbook of safeguards AI companies can adopt to reduce biorisk from their models.

No, there are not hundreds of cloud labs in biology

In a recent appearance on Sam Harris’s Making Sense podcast ​​(#463, “Privatizing the Apocalypse”), Rob Reid claimed that there are “dozens, maybe a hundred” cloud labs and suggested that cloud labs are a major emerging source of biorisk.

LLMs Outperform Experts on Challenging Biology Benchmarks

In a new preprint, I track LLM performance on biology benchmarks over the last three years, finding that models have improved dramatically, now outperforming human expert baselines on several of the most challenging benchmarks.