Anthropic says Zhipu's open-weight GLM-5.3 nearly matches Claude Mythos Preview at building exploits

Anthropic says Zhipu's open-weight GLM-5.3 writes cyber exploits nearly as well as Anthropic's Claude Mythos Preview, with the smaller Flash variant assembling a reliable Chrome attack for $20.40 at Zhipu's API prices. The model's safeguards are easy to strip out and unlocked versions are already circulating, findings the US agency CAISI backs up. Anthropic has its own reasons to sound the alarm.

Zhipu's open-weight model GLM-5.3 writes cyber exploits nearly as well as Claude Mythos Preview, according to Anthropic. Its smaller Flash variant put together a reliable Chrome attack for just $20.40 at Zhipu's API prices. The model's safeguards are easy to strip out, and unlocked versions are already circulating. Anthropic has its own reasons to sound the alarm, but the US agency CAISI backs up the findings. The article Anthropic says Zhipu's open-weight GLM-5.3 nearly matches Claude Mythos Preview at building exploits https://the-decoder.com/anthropic-says-zhipus-open-weight-glm-5-3-nearly-matches-claude-mythos-preview-at-building-exploits/ appeared first on The Decoder https://the-decoder.com .