Z.ai Announces GLM-5.2 After U.S. Government Shuts Down Claude Fable
The timing of Z.ai's announcement, directly referencing the U.S. government's shutdown of rival frontier models, positions GLM-5.2 as both a technical release and a political statement about open access to AI development.
Reporting from 1 sources: GIGAZINE.
Chinese AI company Z.ai announced GLM-5.2 on June 13, 2026, the same day the U.S. government ordered Anthropic to shut down its Claude Mythos 5 and Claude Fable 5 models. Founder Jie Tang framed the release as a response to the restrictions, stating that science should be global. GLM-5.2 will be available to paid subscribers in the third week of June 2026 and later released as an open model.
Z.ai founder Jie Tang called the U.S. government's order to shut down Anthropic's Claude Mythos 5 and Claude Fable 5 a sudden restriction on frontier models for non-technical reasons. In the same announcement, Tang said the path to AGI should not be surrounded by high walls and that all of humanity needs to cooperate. GLM-5.2 is described as a new flagship model with powerful coding capabilities, support for 1 million token input, and the ability to continuously execute long-term tasks. The company plans to release it as an open model in the third week of June 2026, after making it available to subscribers of the paid GLM Coding Plan.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.