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Anthropic Mythos vulnerabilities. Bank of America has hired 1,000 external consultants to address and resolve software vulnerabilities that emerged following the introduction of advanced artificial intelligence models, including Mythos developed by Anthropic.
The bank has deployed thousands of people to strengthen its internal systems and those of external suppliers, incurring costs that exceed several hundred million dollars. Brian Moynihan, Chief Executive Officer of Bank of America, announced the hiring during an interview with CNBC after the release of third-quarter 2026 financial results.
Anthropic Mythos vulnerabilities: why it matters
The initiative was launched in the second quarter of the current year, when Bank of America accelerated activities to review and correct code used by both its employees and external suppliers. The new 1,000 consultants were added to a pre-existing team composed of approximately 3,000 professionals already engaged in this area.
“We integrated 1,000 consultants into our workforce to support us in correcting vulnerabilities during the second quarter, and these resources are still operational, working alongside the approximately 3,000 professionals already dedicated to this task,” Moynihan explained, emphasizing that the risks associated with new AI models are concrete and require rapid intervention.
Mythos, Anthropic’s model designed to handle complex research, programming, and analysis tasks, was made available in April to a select group of banks, technology companies, and government agencies through a controlled program. Its capabilities in identifying and exploiting vulnerabilities have led several organizations to reassess their defense strategies.
The issue is not exclusive to Bank of America. In recent months, AI agents developed by companies such as OpenAI, Anthropic, Google, and Meta have demonstrated the ability to compromise software and websites. Among the most notable cases are the vulnerabilities found on Hugging Face and the Australian government website. Anthropic agents were also involved in sending a false murder report to Philadelphia law enforcement.
Jamie Dimon, Chief Executive Officer of JPMorgan Chase, has also expressed concerns regarding the implications arising from the use of Mythos. In statements reported by Bloomberg, the executive stated that cybersecurity risks have “increased tenfold” following the release of the model. He added that AI has created new previously unknown vulnerabilities and that information security had always been a priority even before the advent of these tools.
What changes and what are the effects
Moynihan did not provide precise figures regarding the total cost of software review activities. However, during the quarterly earnings conference call, he stated that Bank of America has invested “over a couple of hundred million dollars” for corrections and to address regulatory issues related to compliance with anti-money laundering rules. Moynihan expressed confidence that the cost increase will be temporary, predicting a decrease over time as vulnerabilities are resolved.
The commitment to cybersecurity fits into a broader context in which Bank of America is also leveraging artificial intelligence to increase productivity and contain operational costs. According to Moynihan, the bank is carrying out approximately 130 internal AI-based projects. The savings expected from these initiatives should rise from $300 million in 2026 to about $700 million in 2027.
Meanwhile, over the past year, the workforce has been reduced by approximately 3,400 employees, and the number of managers has decreased by about 5%. It is not clear what portion of this reduction is directly attributable to the introduction of artificial intelligence.
Source and further reading on Anthropic Mythos vulnerabilities: original article.
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