6 September 2026

IBM sold Watson Health cancer AI division for $1 billion loss

First reported

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  • IBM invested nearly $4 billion building Watson Health, an AI system meant to help doctors treat cancer patients worldwide, after Watson won Jeopardy in 2011.
  • The system failed in real hospitals, giving wrong or unsafe treatment suggestions and only matching doctor decisions 33% of the time in Danish testing.

How it was covered