Chart says Claude Opus 5 blocks far less defensive coding than Fable 5

repligate · x · 2026-07-25

A repost highlights a chart claiming that, on this traffic, Claude Opus 5 blocks significantly less defensive coding than Claude Fable 5.

The figure shows classifier flag rates for production secure-coding sessions:

The caption argues that Opus 5 should feel similar to prior Opus-class models while giving defenders and defensive cyber use cases a lower-friction experience.

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