# Andrew Tulloch departure from Meta

> Live situation record from CLSTR: https://clstr.news/situations/andrew-tulloch-departure-from-meta
> Updated: 2026-09-16T10:14:44.000Z. Sources: 6. Developments: 2.

Prominent AI researcher and former PyTorch engineer Andrew Tulloch has departed Meta. Initial reports indicated his exit followed a period of intense competition for talent, with speculation that Meta had offered him a compensation package valued at up to $1.5 billion to retain his expertise.

It was later confirmed that Tulloch is joining the AI developer Anthropic. While a Meta spokesperson characterized the reported $1.5 billion compensation figure as “inaccurate and ridiculous,” his departure coincided with a decline in Meta’s share price and occurred shortly after the company released its new AI agent, Muse.

## Timeline

### 2026-09-16: Andrew Tulloch leaves Meta for AI rival Anthropic

Engineer Andrew Tulloch has left Meta for rival AI firm Anthropic, following reports of a massive compensation package.

2 sources. https://clstr.news/cluster/andrew-tulloch-leaves-meta-for-ai-rival-anthropic

### 2026-09-10: AI researcher Andrew Tulloch departs Meta

Renowned AI researcher Andrew Tulloch is leaving Meta less than a year after joining, highlighting the intense global competition for top-tier artificial intelligence talent.

4 sources. https://clstr.news/cluster/ai-researcher-andrew-tulloch-departs-meta

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Cite as: Andrew Tulloch departure from Meta. CLSTR, https://clstr.news/situations/andrew-tulloch-departure-from-meta