OpenAI Offers Cybersecurity AI Tool to UK Banks Blocked by Anthropic
UK banks blocked from cyber AI tool Mythos get offer from rival OpenAI

Image: The Bbc
OpenAI has provided nine major UK banks access to its cybersecurity AI tool, GPT-5.5 Cyber, after rival Anthropic blocked them from using its tool, Mythos. Both tools aim to identify security vulnerabilities in digital systems, with OpenAI emphasizing the importance of responsible access to such technology.
- 01OpenAI's GPT-5.5 Cyber will be accessible to banks including Lloyds Banking Group, HSBC, and Nationwide.
- 02Anthropic's Mythos was previously restricted for UK banks, despite its successful testing in identifying long-hidden vulnerabilities.
- 03The AI Security Institute reported that Mythos and GPT-5.5 Cyber performed similarly in security tasks.
- 04OpenAI's former UK Chancellor George Osborne emphasized the need for responsible distribution of AI tools to prevent misuse.
- 05Cybersecurity expert Prof. Alan Woodward noted that AI can quickly analyze extensive code, making it valuable for identifying issues in outdated banking systems.
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OpenAI has extended access to its cybersecurity AI tool, GPT-5.5 Cyber, to nine major UK banks, including Lloyds Banking Group, HSBC, and Nationwide, after rival Anthropic blocked these banks from using its tool, Mythos. Both AI tools are designed to uncover hidden security vulnerabilities in digital systems and have demonstrated comparable performance in tests conducted by the AI Security Institute. Anthropic's Mythos gained attention for revealing a flaw in a legacy system that had been undetected for nearly 30 years. OpenAI's former UK Chancellor George Osborne stated that the company aims to ensure these tools are used responsibly, emphasizing that they should be in the hands of those who maintain order in society. Cybersecurity expert Prof. Alan Woodward highlighted the efficiency of AI in analyzing millions of lines of code, particularly in legacy banking systems, while also noting the necessity of human oversight to validate findings.
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The availability of OpenAI's GPT-5.5 Cyber to UK banks enhances their ability to identify and address cybersecurity vulnerabilities.
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