The Frontier · Tags

#GLM-5.3

1 published article

• Security · Dispatch

  Anthropic says Z.ai GLM-5.3 brings Mythos-class cyber skills with weak open-weight safeguards

  NIST CAISI already called GLM-5.3 the most cyber-capable open-weight model to date, about four months behind the U.S. frontier. Anthropic adds 64% to 100% simulated safeguard bypass rates.