GLM-5.3

What the sources document

This entry only states what the sources on enterrsi.si document. Release dates, sizes and other specifications are left out unless a source here gives them.

• It told FLI it commissioned no outside pre-release testing, and US CAISSI later called GLM-5.3 the most cyber-capable open-weight model released to date. Containment Board, summary
• US CAISSI assessed GLM-5.2 and GLM-5.3 after release. Containment Board, outside testing
• US CAISSI called GLM-5.3, released Aug 14, 2026, the most cyber-capable open-weight model released to date, about four months behind the US frontier. Containment Board, notable facts

Grade context

The Containment Board grades labs, not single models. Z.ai (Zhipu) gets D overall, rank 9 of 11, on the commitments that decide whether its models can be tested, contained and stopped. See the full report card.

• Safety frameworkD
• Outside testingD
• Shutdown and pauseD
• Incident disclosureD+
• Whistleblower protectionF

Sources

1. AI Safety Index Summer 2026, full report: Pre-deployment External Safety Testing indicator Future of Life Institute · Jul 14, 2026