The European Union's negotiations with Anthropic over access to the Claude Mythos Preview AI model have stalled, leaving European financial institutions without a critical cybersecurity tool. Mythos, capable of identifying zero-day software vulnerabilities, is currently available only to select U.S. partners, including Amazon and JPMorgan Chase. This exclusivity has created a significant cybersecurity gap for European banks, which are unable to stress-test their systems against potential threats. EU Economy Commissioner Valdis Dombrovskis confirmed ongoing discussions with Anthropic, but progress has been minimal. The EU's limited leverage over the private American company complicates efforts to secure access. As European financial infrastructure faces increasing cyber threats, the lack of access to Mythos puts them at a competitive disadvantage compared to U.S. counterparts. The EU may need to explore alternative solutions, such as developing homegrown AI tools or establishing regulatory frameworks to ensure equivalent security testing standards.