Claude Opus 5 tops a prompt-injection robustness chart and drops attacks near zero
EricBuess · x · 2026-07-25
The screenshot shows a chart titled “Indirect prompt injection robustness: Gray Swan IPI benchmark” comparing several models.
The visible takeaway is that Opus 5 sits at the low end of the attack-success bars, with the chart suggesting it is the hardest model to successfully prompt inject among the models shown. The quoted text also says that when strong alignment, prompt-injection probes, and Claude Code Auto Mode are layered together, attack success drops to about 0.
The post frames this as a notable jump in real-world robustness rather than just another benchmark win.
Related event: Claude Opus 5 Sets New Record in Prompt Injection Resistance(2 posts)→
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