Bank of America hired 1,000 outside contractors to address software vulnerabilities. These vulnerabilities were highlighted by advanced AI models like Anthropic's Mythos. The bank's CEO, Brian Moynihan, explained that they needed to quickly bolster their internal and vendor code. This proactive measure was necessary due to the emerging risks posed by frontier AI models. In addition to thousands of internal employees, 1,000 contractors were brought in during the second quarter. These contractors are still assisting the bank with ongoing work. The effort involved a significant financial investment. Bank of America incurred hundreds of millions of dollars in extra expenses in the third quarter. These costs were associated with software remediation and regulatory compliance. The regulatory issues specifically related to anti-money laundering compliance.