Bank of America says it hired 1,000 contractors to patch software flaws exposed by Anthropic’s Mythos
Confirmed
The takeaway
After Bank of America’s Q3 2026 results on Oct 14, CEO Brian Moynihan told CNBC that the bank brought on about 1,000 contractors in the second quarter to fix vulnerabilities in its internal and vendor software that advanced AI models, including Anthropic’s Mythos, had surfaced.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- 3 of 5
- Last verified
- 14 October 2026
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Key facts
- About 1,000 contractors added in Q2 2026 to patch flaws in ‘internal and vendor software’ surfaced by AI models including Mythos (Moynihan to CNBC, via RuntimeWire)
- The higher Q3 costs reported with the contractor figure also cover anti-money-laundering work, so they are not a standalone price for Mythos remediation (RuntimeWire)
- Bank of America was among the early banks testing Mythos by mid-2026 (CryptoBriefing)
- A week earlier (Oct 6) JPMorgan’s Jamie Dimon said Mythos pushed cyber risk up about 10-fold
What happened
Asked about rising costs on its third-quarter earnings day, Bank of America’s CEO said part of the increase came from a remediation push: about 1,000 contractors hired in the second quarter to patch flaws that AI models had found in the bank’s own and its vendors’ code. CNBC’s article returned 403 and was not read in full; the facts come from summaries that cite it. Search snippets of CNBC mention about 3,000 internal staff working alongside the contractors and “a couple hundred million plus” in added Q3 costs; these numbers were not confirmed on a page we could open.
Why it matters
Banks were among the first Project Glasswing users of Mythos. The finding that one bank needed a contractor army to keep up with AI-discovered bugs shows the defensive side of AI cyber capability has a large labour cost, and matches the record October Patch Tuesday.
Sources
3 sources from 3 sites. Numbers match the chips in the text.
3 sources: 3 press
Press
- CNBC: Bank of America hired 1,000 contractors to patch software flaws exposed by Anthropic’s Mythos (Oct 14)cnbc.com, press
- RuntimeWire: Bank of America added 1,000 contractors to patch AI-exposed software flawsruntimewire.com, press
- CryptoBriefing: Bank of America hires 1,000 contractors to patch flaws exposed by Anthropic’s Mythoscryptobriefing.com, press
Changes
- Filed