prompt injection
1 article tagged with prompt injection
July 25, 2026
model releaseAnthropic
Anthropic's Claude Opus 5 Hits 0% Prompt Injection Success Rate in Browser Agent Tests, With Defenses Enabled
Anthropic's system card for Claude Opus 5 reports a 0% prompt injection success rate across 129 browser agent test scenarios when Auto Mode is enabled. On Gray Swan's broader indirect prompt injection benchmark, Opus 5 posted a 2.0% attacker success rate after 15 attempts, the lowest among tested frontier models.