OpenAI rolls out new model for cybersecurity teams a month after Anthropic's Mythos debut

Date:
Fri, 08 May 2026 14:20:00 +0000

Description:
GPT-5.5-Cyber is now available to TAC members, but it's a slight upgrade from 5.4.

FULL STORY ======================================================================Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Threads Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter OpenAI introduces GPT5.5Cyber following uproar around Anthropic Mythos It's a modest upgrade focused on permissive cybersecurity tasks like vuln triage and malware analysis Access
is limited to vetted teams in the Trusted Access for Cyber (TAC) program, unlike Anthropics more restricted Mythos Preview OpenAI has introduced GPT-5.5-Cyber , an upgraded cybersecurity model looking to take some of the shine off Anthropic's Mythos Preview release.

Coming less than a month after the launch of GPT-5.4-Cyber, this is not a major upgrade by any means, and users should not expect many changes, OpenAI explained. instead, users should expect a model trained to be more permissive when it comes to cybersecurity tasks, making it easier to use for things like vulnerability identification, triage, patch validation, and malware analysis. Latest Videos From You may like OpenAI reveals its Mythos rival designed for cybersecurity pros 'We love you, and we want you to win' OpenAI releases GPT-5.5 for ChatGPT Project Glasswing wants to use AI to prevent AI cyberattacks Competing with Mythos GPT5.5Cyber lets a smaller set of partners study advanced workflows where specialized access behavior may matter, OpenAI said in a blog post.

The cyber defense ecosystem is broad, and GPT5.5 and GPT5.5Cyber play different roles in meeting the needs of organizations and researchers across it, depending on the task, the setting, and the safeguards around how the model is used. For most teams, GPT5.5 with TAC is our strongest broadly
useful model for legitimate defensive work, with strong safeguards against misuse.

As with the previous version, this edition will only be given only to vetted cybersecurity teams. However, unlike its key competitor - Mythos, which was given to only a handful of companies, OpenAIs model will be offered to a broader set of users, members of the Trusted Access for Cyber (TAC) program.

Back when it introduced GPT-5.4-Cyber , OpenAI said it was scaling TAC to thousands of verified individual defenders and hundreds of teams responsible for defending critical software." Are you a pro? Subscribe to our newsletter Sign up to the TechRadar Pro newsletter to get all the top news, opinion, features and guidance your business needs to succeed! Contact me with news
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Anthropic first disclosed Project Glasswing in early April 2026, saying that the AI model Mythos Preview was too powerful to be given freely. Apparently, it was able to surface decades-old vulnerabilities in some of the most widely-used operating systems in existence, and chain them together to create working exploits. The best antivirus for all budgets Our top picks, based on real-world testing and comparisons

Read our full guide to the best antivirus 1. Best overall: Bitdefender Total Security 2. Best for families: Norton 360 with LifeLock 3. Best for mobile: McAfee Mobile Security Follow TechRadar on Google News and add us as a preferred source to get our expert news, reviews, and opinion in your feeds.



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Link to news story: https://www.techradar.com/pro/security/openai-rolls-out-new-model-for-cybersec urity-teams-a-month-after-anthropics-mythos-debut


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