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Latest / Frontier models and safety

Model releaseFrontierChinaConfirmed

Zhipu releases GLM-5.3, claiming a 50% coding gain and parity with Mythos 5 on code review

See how this story connects

Source: Z.aiAlso reported by Hugging Face

Z.ai released GLM-5.3, reporting a 50% coding gain over GLM-5.2 on its own Code Bench and the top published scores among open models on public benchmarks including Terminal Bench 3.0. Its release notes also report cybersecurity results: matching Claude Mythos 5 on white-box code review and finding 2,436 vulnerabilities in real-world testing. GLM-5.3-Flash followed on 26 August with native visual capabilities and a hybrid linear and sparse attention design of 320 billion total and 18 billion active parameters; its weights are on Hugging Face.

Why it matters

An open model is claiming code-review parity with Mythos 5, and Anthropic’s later assessment said its safeguards were easily bypassed.

When
18 Aug 2026
ID
WTA-N-2026-0257
Where
China
Who
Zhipu AI

Summary by wheresthe.ai, from Z.ai and the reporting credited above. Checked against the source on 12 Oct 2026.

Read the original at Z.ai

Source copy: download the page as saved on 18 Oct 2026 (PDF). Also held by the Internet Archive.

Next stop on this Storyline: Led toAnthropic says Zhipu’s GLM-5.3 builds cyber exploits with safeguards easily bypassed

Cite this story

WTA-N-2026-0257: “Zhipu releases GLM-5.3, claiming a 50% coding gain and parity with Mythos 5 on code review.” wheresthe.ai, 18 Aug 2026. https://wheresthe.ai/d/cn-zhipu-glm-5-3-release-2026-08/ (source: Z.ai).

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