OpenAI releases new cyber security model to limited group of customers
Launch of GPT-5.4-Cyber follows concern about ability of Anthropic’s Mythos to find software bugs
Launch of GPT-5.4-Cyber follows concern about ability of Anthropic’s Mythos to find software bugs

Mythos model was able to detect critical software vulnerabilities that were missed by legacy systems

New system has sparked fears it could turbocharge hacking and expose weaknesses faster than they can be fixed

Start-up has limited the release of the new tool because of concerns about its hacking abilities

Claude Mythos opened to Amazon, Microsoft and Apple to detect hidden software vulnerabilities

Chief Sam Altman hailed next-generation system as ‘major upgrade’

Leading banks, insurers and exchanges to be warned over cyber security vulnerabilities exposed by Claude Mythos