Claude Improves its Latest Opus 5 Model to Increase Resistance to Prompt Injection Attacks
8/4/26 Prompt injection is a type Large Language Model (LLM) attack in which an attacker manipulates the instructions or data provided to an AI model, causing it to ignore its intended behavior, reveal sensitive information, or perform unauthorized actions. It represents a security risk that requires guardrails be built into models to reduce exposure to attack,