PI evals
AssessTechniques
Prompt-injection evaluation tests used to measure how vulnerable a model is to injection attacks.
Why it's here
Placed in Assess: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.
Evidence (1)
- 3Simon Willison·7/25/2026researchBoris Cherny on Opus 5’s resistance to prompt injection
Boris Cherny said that Opus 5 is the least prompt-injectable model he has seen, based on PI evaluations and red-teaming. He noted this as a standout property beyond the model’s benchmark scores, and pointed readers to the relevant system card section.