Chinese AI company Zhipu announced on June 13 that its GLM-5.2 model will open to all GLM Coding Plan users at 17:21, covering Lite, Pro, Max, and team editions. The announcement follows a US government order on June 12 at 5:21 PM local time requiring Anthropic to immediately cut all non-US nationals' access to its Claude Fable 5 and Mythos 5 models, citing national security. Zhipu stated that frontier intelligence should be open, available, and serve every developer, positioning GLM-5.2 as an alternative amid restricted access to closed-source models.
Zhipu Opens GLM-5.2 Model to All Users on June 13
Zhipu described GLM-5.2 as its most capable open-source model to date, supporting 1M context and maintaining a lead in long-range coding tasks. The company confirmed that the GLM-5.2 API will launch next week and the model will be open-sourced next week. In its announcement, Zhipu stated: "At a moment when some frontier models suddenly become unavailable, we choose to believe in another path: frontier intelligence should not belong only to a few, nor should it be withdrawn at any time by a few rules. It should be open, available, buildable, and serve every developer."
US Government Orders Anthropic to Ban Non-US Access to Claude Models
On June 12 at 5:21 PM local time, Anthropic received an emergency letter from the US government. The government issued an export control directive citing national security department instructions, requiring Anthropic to immediately cut off all foreign nationals' access to its Claude Fable 5 and Mythos 5 models, whether inside or outside the US, including the company's own non-US employees. Anthropic was forced to globally disable these two models for all non-US users less than 72 hours after their release. Anthropic stated that the US government's decision was based on "serious misunderstandings."
Anthropic Launched Claude Fable 5 on June 9
On June 9, Anthropic announced the launch of Claude Fable 5, the first publicly available "Mythos-class" series model. The company's latest frontier model, Claude Mythos 5, continued to be available through the Project Glasswing program to a limited number of cybersecurity defenders and infrastructure providers. Anthropic stated that Fable 5's performance surpassed all previously released models and led in nearly all AI performance benchmarks. The company stated: "The longer and more complex the task, the stronger Fable 5's lead over other models." Anthropic's release noted that Stripe used Fable 5 to perform migrations in a 50 million-line Ruby codebase, compressing work that originally took a team two months into one day.
FAQ
What did Zhipu announce on June 13?
Zhipu announced on June 13 that its GLM-5.2 model will open to all GLM Coding Plan users at 17:21, covering Lite, Pro, Max, and team editions. The company confirmed the GLM-5.2 API will launch next week and the model will be open-sourced next week.
Why did the US government order Anthropic to ban non-US access to Claude models?
On June 12 at 5:21 PM local time, the US government issued an export control directive citing national security department instructions, requiring Anthropic to immediately cut off all foreign nationals' access to Claude Fable 5 and Mythos 5 models, whether inside or outside the US.
When did Anthropic launch Claude Fable 5?
Anthropic launched Claude Fable 5 on June 9 as the first publicly available "Mythos-class" series model. The company stated Fable 5's performance surpassed all previously released models and led in nearly all AI performance benchmarks.
