China's Z.ai GLM-5.2 tops OpenAI’s GPT 5.5 model on key benchmarks (opens original article in a new tab)

Chinese startup Z.ai's GLM-5.2 large language model outperformed several leading AI models on benchmarks and offers open-source access with enterprise plans.

• Chinese startup Z.ai released GLM-5.2, a large language model with a 1-million-token context window for long-horizon coding tasks
• GLM-5.2 outperformed open-source models and scored close to or above closed-source models like GPT-5.5 and Claude Opus 4.8 on benchmarks
• Z.ai offers enterprise subscriptions starting at $12.60 per month and released GLM-5.2 under an MIT open-source license