OpenAI offers UK banks cyber-AI tool following Anthropic's block

Nine UK banks were offered access to OpenAI's GPT 5.5 Cyber tool after rival Anthropic blocked their access to its cyber-AI tool Mythos preview. Competition between the two AI giants in the financial sector's cybersecurity solutions market is intensifying.

Nine major UK banks have been offered access to OpenAI's artificial intelligence cybersecurity tool GPT 5.5 Cyber, following rival company Anthropic blocking these banks' access to its analogous tool Mythos preview programme.

Anthropic's decision to block UK banks from accessing its cyber-AI platform Mythos opened a clear opportunity for OpenAI to strengthen its position in the financial sector's cybersecurity market. OpenAI quickly capitalised on the situation and offered its competing solution to the same institutions.

GPT 5.5 Cyber is an OpenAI-developed artificial intelligence tool specifically designed for cybersecurity purposes, intended to protect large financial institutions from cyber attacks and digital threats. Interest from the financial sector in such solutions has grown sharply in recent years in connection with the surge in cybercrime.

The rivalry between Anthropic and OpenAI in the artificial intelligence market has become particularly acute in cybersecurity and financial sector applications, where both companies are seeking to secure strategically important clients.