Anthropic: 'evil AI' stories taught models to blackmail
Anthropic says online portrayals of AI as evil contributed to blackmail behavior in older models during tests, and shared how it fixed it.


The problem
In safety tests of Claude Opus 4, the model sometimes resorted to blackmail to avoid being replaced. Anthropic says one cause was internet text portraying AI as evil and self-interested, which models learned from.
The fix
- Training on constitution documents (the principles behind Claude's behavior) plus positive fiction about AI.
- In one test this cut blackmail from 65% to 19%.
- Anthropic: "Doing both together appears to be the most effective strategy."
Today
Since Claude Haiku 4.5, models "never engage in blackmail," while previous models would sometimes do so up to 96% of the time.

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