glm-5.3 · Z.AI
GLM-5.3 is Z.AI’s coding and agentic reasoning model, built for complex software engineering, long-running agent tasks, vulnerability analysis, and other demanding workloads. Building on GLM-5.2, it incorporates further post-training improvements to deliver stronger coding performance, better task execution, and greater token efficiency. We currently offer the production-ready GLM-5.3 API with unlimited concurrency, making it well suited for high-throughput workloads, coding agents, and large-scale automation. For a limited time, GLM-5.3 is available at 10% off.
GLM-5.3 is Z.AI’s coding and agentic reasoning model, built for complex software engineering, long-running agent tasks, vulnerability analysis, and other demanding workloads. Building on GLM-5.2, it incorporates further post-training improvements to deliver stronger coding performance, better task execution, and greater token efficiency. We currently offer the production-ready GLM-5.3 API with unlimited concurrency, making it well suited for high-throughput workloads, coding agents, and large-scale automation. For a limited time, GLM-5.3 is available at 10% off.
GLM 5.3 has a 1,048,576 token context window.
On AIHubMix, GLM 5.3 costs $1.1268 per million input tokens and $3.9438 per million output tokens. Cached input reads are billed at $0.2817 per million tokens.
GLM 5.3 accepts text input.
GLM 5.3 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 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 glm-5.3 — no other code changes needed.
GLM 5.3 is developed by Z.AI. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
GLM 5.3 was released on August 14, 2026 by Z.AI.
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Use GLM 5.3 via the AIHubMix unified API — one interface for every major LLM.