# Anthropic's Opus 5 Shows Stronger Prompt Injection Resistance

Security expert Bruce Schneier highlights that Anthropic's latest AI model, Opus 5, demonstrates significantly improved resistance to prompt injection attacks. This matters because prompt injection is a critical vulnerability that can trick AI systems into bypassing their safety rules or taking unintended actions. The improvement signals a step forward in making advanced AI models more secure and trustworthy.

**Importance:** 3/5

## Sources

### Security
- [Schneier on Security](https://www.schneier.com/blog/archives/2026/07/anthropics-opus-5-is-better-at-resisting-prompt-injection.html) — Fri, 31 Jul 2026 17:23:16 +0000