---
id: "2025-07-29-virtual-lab-ai-agents-nanobodies"
url: "https://postcutoff.com/e/2025-07-29-virtual-lab-ai-agents-nanobodies/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2025-07-29"
date_precision: month
category: science
importance: 3
confidence: high
status: [Result confirmed]
verification: Peer-reviewed
sources: 2
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2025-07-29-virtual-lab-ai-agents-nanobodies/

# Stanford's 'Virtual Lab' of AI agents designs SARS-CoV-2 nanobodies validated in the lab

James Zou's group (Nature, 2025) had an LLM 'principal investigator' agent run a team of AI scientist agents. The team built a pipeline combining ESM, AlphaFold-Multimer and Rosetta and designed 92 nanobodies. Two showed improved binding to recent SARS-CoV-2 variants (JN.1 or KP.3) while keeping binding to the ancestral spike.

## Key facts
- Agents: PI agent plus specialist agents (immunology, computational biology, ML) and a critic
- 92 nanobodies designed; 2 with improved binding to JN.1 or KP.3
- Human role: high-level feedback and all wet-lab work; preprint Nov 2024, Nature 2025

## What happened

Instead of a single model, a simulated research group of LLM agents held "meetings", chose tools and designed an experiment that humans ran.

## Why it matters

It was a peer-reviewed demonstration of multi-agent AI doing interdisciplinary research design with real lab outcomes.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): in its training data
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): in its training data
- Grok 4.7 (training cutoff May 2026): in its training data

## Sources

1. [The Virtual Lab of AI agents designs new SARS-CoV-2 nanobodies (Nature)](https://www.nature.com/articles/s41586-025-09442-9) (nature.com, paper)
2. [GitHub: zou-group/virtual-lab](https://github.com/zou-group/virtual-lab) (github.com, code)

## Changes

- 2026-09-29 (filed): Created

## Related

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- 2025-02-19: [Google's AI co-scientist independently reproduces an unpublished superbug discovery in 48 hours](https://postcutoff.com/e/2025-02-19-google-ai-co-scientist/index.md)