Z.ai

Editorial Review

Z.ai, formerly known as Zhipu AI, has rapidly established itself as one of China's top AI companies with its GLM family of foundation models. The flagship GLM-5, with 744 billion total parameters in a Mixture of Experts architecture, competes with leading Western models on coding, reasoning, and agentic tasks. The company's IPO on the Hong Kong Stock Exchange in January 2026 marked a significant milestone as China's first major LLM company to go public. For developers, Z.ai offers compelling value with its tiered pricing. Free access to flash models handles simple tasks, while the GLM Coding Plan starts at just $3/month for 120 prompts—making it one of the most affordable AI coding assistants available. The API supports OpenAI and Anthropic formats, making migration from other providers straightforward. The 200K context window and tool calling capabilities position GLM-5 well for complex agentic workflows. However, Z.ai has faced growing pains. In early 2026, compute resource shortages led to user complaints and restricted signups, and the company's stock experienced significant volatility. The platform's documentation and interface are primarily designed for Chinese-speaking users, which may present a barrier for international developers despite the English-language API documentation.