UK banks are being denied access to the Mythos AI tool, with some reports indicating that Anthropic, the tool's developer, is limiting its use. Meanwhile, OpenAI has offered the banks an alternative, amid concerns from finance leaders and security experts about the potential risks of the Mythos model. The status and implications of the Mythos AI tool remain uncertain, with some outlets suggesting it may be released to the public and others highlighting its potential threat to global cybersecurity.