GPT-6 Astra Scores 100% on ExploitBench as OpenAI Blocks PoC Exploit Requests

OpenAI on Thursday officially unveiled GPT‑6 Astra, which it described as the "world's most intelligent and aligned model."

The development comes days after the artificial intelligence (AI) company said the model had reached the "Critical" cybersecurity capability threshold under its Preparedness Framework.

"Astra is state-of-the-art on computer use, browsing, software engineering, cybersecurity, science, and professional work. Astra saturates FrontierMath Tier 4 with a 98% score," OpenAI said. "Astra also saturates ARC-AGI-3 with a 99.9% score and ExploitBench with a 100% score. It also sets a new frontier on computer and browser use, handling the most demanding professional work with unmatched speed, accuracy, and judgment."

The model is currently rolling out to a small set of organizations and is expected to be available to all ChatGPT Plus, Pro, Business, and Enterprise users, as well as through the OpenAI API, Microsoft Azure, and Amazon Web Services (AWS) Bedrock.

On ExploitBench, which evaluates a model's ability to turn known software vulnerabilities into working exploits, Astra achieved a perfect score of 100%, as opposed to 78.5% for GPT‑5.6 Sol, its previous frontier cyber-capable model.