As recorded at collection: 3 Z.AI GLM Flash models, free with no limits

Z.AI is the international platform of Zhipu AI (智谱AI), the company behind the AI conversation service ChatGLM. Its free models are GLM-4.5-Flash for fast general conversations, GLM-4.7-Flash for general conversations using the latest generation, and GLM-4.6V-Flash for visual recognition that reads images. The prices for input, cached input, cache storage, and output are all 0 dollars per 1 million tokens.

The setup difficulty is 1 out of 5, so you can get started right away. Check pricing information and instructions in the official documentation, then obtain an API key (an authentication string required to use the service). Replace the connection address and authentication key in an existing program with Z.AI's, and it will work as is. Since it is compatible with OpenAI, you can also connect it to tools such as LangChain or OpenRouter without any modifications.

There is no monthly usage cap or credit balance, and there is no separate expiration date. You do not need to register a card or top up a balance, and because it uses international servers, you do not need a mainland China mobile phone number. Only the number of concurrent requests is limited. There are no limits on requests per minute or tokens per minute.