TL;DR
- →GLM-5.2 launched June 13, 2026 as Z.ai's fourth flagship coding release in four months, immediately live on every GLM Coding Plan tier.
- →The headline spec is a 1,000,000-token usable context window, a 5x jump from GLM-5.1's ~200K alongside a new High/Max thinking-effort system.
- →Standalone API access, the chat.z.ai chatbot, and MIT-licensed open weights are all promised for "next week." None of them shipped at launch.
- →Z.ai published zero benchmark numbers for GLM-5.2 itself. Every comparison circulating online right now is borrowed from GLM-5.1's confirmed scores.
- →The release landed in the same window as the US government's order pulling Anthropic's Mythos and Fable 5 models offline, a coincidence the developer community didn't let pass quietly.
- →For builders already on a Coding Plan, switching today is a config change. For everyone else, the "open" part of this release hasn't actually arrived yet.
ON THIS PAGE
1,000,000
Usable context tokens
Labeled glm-5.2[1m] in Z.ai's own config examples, a 5x jump from GLM-5.1's ~200K-token window, with up to 131,072 output tokens per response.
