Former Stability AI Research Lead Edwin Arbus Announces Move to Anthropic

Edwin Arbus, former head of research at Stability AI, announced on X around September 1 that he has officially joined Anthropic, in the latest example of talent mobility in the AI industry.

Confirmed

• Arbus himself tweeted the news of joining Anthropic, with multiple posts (from @edwinarbus, @altryne, and others) relaying the announcement
• He celebrated by sharing a photo of a morning run on his first day
• Several friends retweeted to congratulate him

Why it matters

• Arbus previously served as head of research at Stability AI, making this a departure at the core Stable Diffusion team level
• Stability AI has seen multiple core researchers leave since 2024 (including CEO Emad Mostaque's exit), and this move continues that trend
• Anthropic has been steadily recruiting well-known AI researchers, showing that the talent-gathering effect at top labs is still intensifying
• The posts did not disclose Arbus's specific role or research direction at Anthropic, which is worth watching going forward

2026-09-01 ~ 2026-09-02 · 6 related posts

• [source] Former Stability AI Research Lead Edwin Joins Anthropic — edwinarbus · 2026-09-01
• Edwin Arbus joins Anthropic — altryne · 2026-09-01
• Edwin joins Anthropic as engineer — lennysan · 2026-09-01
• Edwin Arbus announces he has joined Anthropic — chongdashu · 2026-09-02
• Edwin Arbuthnott joins Anthropic — a_baaron · 2026-09-02
• Edwino Arbosa joins Anthropic — sashadem · 2026-09-02