Yes
It not only found bugs but also correlated them to relevant UI and backend code
throwaway7783 on Hacker News
In the thread “Launch HN: Momentic (YC W24) – Agents that catch bugs by using your app”
Helped: Giving the agents access to the source code and driving the app via browser.
… At my last job, we did this - gave access to codebase to codex/CC, allowed it to drive the app via browser (+ playwright). It not only found bugs but also correlated them to relevant UI and backend code. We didn't benchmark against anything else, but it was amazing to see it in action.