OpenAI has added prompt-injection results to the GPT-5.6 system card, reporting a low failure rate for attacks delivered directly through chat but higher rates in tests involving AI agents and external content. In the Aug. 3 update, GPT-5.6 Sol failed on about 0.05% of direct attacks generated by GPT-Red, the company’s automated red-teaming model.
Malicious instructions hidden in content processed by agents were more successful. Average attack success rates reached 3.77% for Sol, 3.32% for Terra and 2.94% for Luna in OpenAI’s indirect tests. Such instructions can arrive through emails, webpages, uploaded files, code repositories or tool…
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