Yes
Yesterday, Opus 4.6 took the initiative to aggressively fuzz a public API of a frontier lab I was investigating, and it found a real vulnerability after 100+ uninterrupted tool calls
lebovic on Hacker News
100+ uninterrupted tool calls
In the thread “Evaluating and mitigating the growing risk of LLM-discovered 0-days”
Helped: Aggressive fuzzing of public API via network traffic analysis.
… Opus 4.6 is a very eager model that doesn't give up easily. Yesterday, Opus 4.6 took the initiative to aggressively fuzz a public API of a frontier lab I was investigating, and it found a real vulnerability after 100+ uninterrupted tool calls. That would have required lots of of prodding with previous models. …