# GPT-6 Astra Is the First Model OpenAI Classifies as Critical for Cybersecurity

DevFeed: [GPT-6 Astra Is the First Model OpenAI Classifies as Critical for Cybersecurity](<https://devfeed.tech/articles/gpt-6-astra-is-the-first-model-openai-classifies-as-critical-for-cybersecurity-41296.md>)

Original publisher: [Read original article](<https://www.infoq.com/news/2026/09/gpt-6-astra-critical-cyber/>)

Author: Steef-Jan Wiggers

Published: 2026-09-17T04:59:00Z

Content type: news

Language: en

Sources: [InfoQ](<https://devfeed.tech/sources/infoq.md>)

Topics: [Cybersecurity](<https://devfeed.tech/topics/cybersecurity.md>), [gpt-6-astra](<https://devfeed.tech/topics/gpt-6-astra.md>), [OpenAI](<https://devfeed.tech/topics/openai.md>), [Vulnerabilities](<https://devfeed.tech/topics/vulnerabilities.md>), [Exploit](<https://devfeed.tech/topics/exploit.md>), [browser](<https://devfeed.tech/topics/browser.md>), [Kernel](<https://devfeed.tech/topics/kernel.md>), [Chain-of-thought](<https://devfeed.tech/topics/chain-of-thought.md>)

Tags: [agents](<https://devfeed.tech/tags/agents.md>), [ai](<https://devfeed.tech/tags/ai.md>), [ai-ml-data-engineering](<https://devfeed.tech/tags/ai-ml-data-engineering.md>), [architecture](<https://devfeed.tech/tags/architecture.md>), [architecture-design](<https://devfeed.tech/tags/architecture-design.md>), [azure](<https://devfeed.tech/tags/azure.md>), [browser](<https://devfeed.tech/tags/browser.md>), [chain-of-thought](<https://devfeed.tech/tags/chain-of-thought.md>), [cloud](<https://devfeed.tech/tags/cloud.md>), [cybersecurity](<https://devfeed.tech/tags/cybersecurity.md>), [development](<https://devfeed.tech/tags/development.md>), [devops](<https://devfeed.tech/tags/devops.md>), [exploit](<https://devfeed.tech/tags/exploit.md>), [generative-ai](<https://devfeed.tech/tags/generative-ai.md>), [governance](<https://devfeed.tech/tags/governance.md>), [gpt-6-astra](<https://devfeed.tech/tags/gpt-6-astra.md>), [gpt-6-astra-critical-cyber](<https://devfeed.tech/tags/gpt-6-astra-critical-cyber.md>), [kernel](<https://devfeed.tech/tags/kernel.md>), [machine-learning](<https://devfeed.tech/tags/machine-learning.md>), [ml-data-engineering](<https://devfeed.tech/tags/ml-data-engineering.md>), [news](<https://devfeed.tech/tags/news.md>), [openai](<https://devfeed.tech/tags/openai.md>), [vulnerabilities](<https://devfeed.tech/tags/vulnerabilities.md>), [zero-day](<https://devfeed.tech/tags/zero-day.md>)

## AI overview

OpenAI classified GPT-6 Astra as the first model to reach its Critical cybersecurity threshold. Expert-led evaluations reported previously unknown vulnerabilities in a browser and an operating-system kernel, along with working exploit chains. The system card also reported a substantial decline in chain-of-thought monitorability.

## Source excerpt

OpenAI has classified GPT-6 Astra at the Critical cybersecurity threshold under its Preparedness Framework, a first. In expert-led testing the model found previously unknown vulnerabilities in a browser and an OS kernel and built working exploits. The same system card reports a substantial decline in chain-of-thought monitorability. By Steef-Jan Wiggers