Boris Cherny Quote: Opus 5 Is the Least Prompt-Injectable Model
Anthropic
Boris Cherny stated that Opus 5 is the least prompt-injectable model yet, based on PI evals and red teaming. This is highlighted in the system card on page 73.
Boris Cherny, in a quote from July 25, 2026, emphasized that Opus 5 is the least prompt-injectable model they have produced. He noted that this detail is somewhat buried in the system card, but across prompt injection evaluations and red teaming, Opus 5 proves very hard to successfully prompt inject. The system card section appears on page 73.
- Сокращения
- PI = Prompt Injection — инжекция промптов
Source: Simon Willison —
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