Watching GPT-5.6 Sol Ultra Write a Chrome Exploit: Exploit Development as We Know It Is Dead
Three months ago, I wrote a blog titled “I Let Claude Opus Write a Chrome Exploit: The Next Model (Mythos?) Won’t Need My Help?”. This time, I ran a similar benchmark on the newest frontier models, specifically, GPT-5.6 Sol Medium, Sol Ultra, and Grok 4.5, and watched Sol Ultra hill-climb a full renderer exploit on recent Chrome from start to finish, and popped the calculator with limited nudges.
It is a huge jump and wildly different approach from the Opus 4.6 model I tested last time. Below I will cover what set it apart, and why I think exploit development as we know it is dead for anyone who can throw inference-scale compute at a model at GPT-5.6’s level or above.
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Watching GPT-5.6 Sol Ultra Write a Chrome Exploit: Exploit Development as We Know It Is Dead
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Three months ago, I wrote a blog titled “I Let Claude Opus Write a Chrome Exploit: The Next Model (Mythos?) Won’t Need My Help?”. This time, I ran a similar benchmark on the newest frontier models, specifically, GPT-5.6 Sol Medium, Sol Ultra, and Grok 4.5, and watched Sol Ultra hill-climb a full renderer exploit on recent Chrome from start to finish, and popped the calculator with limited nudges.
It is a huge jump and wildly different approach from the Opus 4.6 model I tested last time. Below I will cover what set it apart, and why I think exploit development as we know it is dead for anyone who can throw inference-scale compute at a model at GPT-5.6’s level or above.