What GLM models are available?

We offer the latest GLM-5.3 and GLM-5.3 Flash, plus GLM-5.2, GLM-5.1, GLM-5, GLM-4.7, and GLM-4.6.

GLM-5.3 is the latest model from Zhipu AI, and GLM-5.3 Flash is its faster, lower-cost Flash variant. Earlier GLM-5.x and GLM-4.x models remain available.

How is pricing calculated?

Token-based pricing (input + output). GLM-5.3 Flash is the low-cost option, and GLM-5.3 is the premium tier. Check the pricing table above for specific rates.

Is the API compatible with OpenAI's SDK?

Yes. GLM models use the standard chat completions format and work with the OpenAI SDK.

Yes. Your API data is not stored or used for training. All requests are encrypted.

Which GLM model should I choose?

GLM-5.3 Flash for fast, low-cost tasks. GLM-5.3 for maximum quality. Earlier GLM-5.x and GLM-4.x models remain available — compare their prices in the table above.

How much does the GLM API cost?

The Zhipu AI GLM API is billed per million input and output tokens. The pricing table on this page lists every available model, and the prices shown are Gold member rates (20% off). Platinum and Diamond members save even more, up to 28%, and you only pay for successful requests.

How do I get a GLM API key?

Sign up for APIMart, open the API Keys page in your dashboard, and create a key. The same key works for the Zhipu AI GLM API and every other model on the platform, with pay-as-you-go billing and no subscription.

How do I use the GLM-5.3 API?

Call APIMart's OpenAI-compatible Chat Completions endpoint with your APIMart API key and set model to glm-5.3 or glm-5.3-flash. The rest of the GLM 5 API lineup (glm-5, glm-5.1 and glm-5.2) uses the same request format, so switching only means changing the model ID. Parameters and code examples are in the APIMart docs (docs.apimart.ai).

Back to models

LLM

GLM API

Zhipu AI's GLM model family — Chinese-English bilingual models with rapid iteration from GLM-4.6 to GLM-5.3, delivering strong reasoning and generation quality.

BilingualReasoningChat

Get API Key