coding-glm-5.3 · Z.AI
GLM-5.3 is Z.ai’s reasoning model for coding and agentic workflows, designed for complex software engineering, long-running agents, and vulnerability analysis. It uses the same base model as GLM-5.2, with scaled post-training improving coding, task execution, and token efficiency. This model is a limited-time preview version of GLM-5.3, intended for testing and evaluation only. Service stability is not guaranteed, and we do not recommend using it in production environments. We’re waiting for the official commercial API release and will integrate it as soon as official support becomes available.
GLM-5.3 is Z.ai’s reasoning model for coding and agentic workflows, designed for complex software engineering, long-running agents, and vulnerability analysis. It uses the same base model as GLM-5.2, with scaled post-training improving coding, task execution, and token efficiency. This model is a limited-time preview version of GLM-5.3, intended for testing and evaluation only. Service stability is not guaranteed, and we do not recommend using it in production environments. We’re waiting for the official commercial API release and will integrate it as soon as official support becomes available.
GLM 5.3 (coding) has a 1,048,576 token context window.
On AIHubMix, GLM 5.3 (coding) costs $0.06 per million input tokens and $0.22 per million output tokens. Cached input reads are billed at $0.015 per million tokens.
GLM 5.3 (coding) accepts text input.
GLM 5.3 (coding) supports thinking, tool calling, function calling and structured outputs. Per-protocol parameter support is listed in the capability table on this page.
GLM 5.3 (coding) is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to coding-glm-5.3 — no other code changes needed.
GLM 5.3 (coding) is developed by Z.AI. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
GLM 5.3 (coding) was released on August 14, 2026 by Z.AI.
Free version: Coding GLM 5.3 (free)
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