CODELLM

GLM-5.3 API

All You Need to Know About GLM-5.3 API

Overview

Model Provider:Zai-org

Model Type:CODE/LLM

State:Ready

Key Specs

Quantization:BF16

Parameters:753B

Context:1M

Pricing:$1.50 input / $4.40 output / $0.26 cache

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Introduction

GLM-5.3 is Z.ai's latest flagship model, delivering comprehensive advancements in complex software engineering and agent capabilities. It uses the same base model as GLM-5.2, with all improvements driven by post-training. Compared with GLM-5.2, it delivers significantly stronger performance in complex programming and long-horizon tasks:

Stronger Coding Capability

GLM-5.3 delivers a significant improvement in coding capabilities, achieving a 50% performance gain over GLM-5.2 on Z.ai Code Bench. It also reaches state-of-the-art (SOTA) performance among open-source models on public benchmarks, including Terminal Bench 3.0 and Agents' Last Exam (CLI).

Emergent Cyber Capability

As the scale of post-training continues to expand, the model's cybersecurity capabilities have improved at a rate that exceeds expectations. GLM-5.3 achieves the best performance to date on the CyberGym vulnerability discovery benchmark. Moreover, the deeper it progresses along the vulnerability exploitation chain, the more pronounced its gains over GLM-5.2 become, with scores on vulnerability exploitation benchmarks exceeding twice those of GLM-5.2.

GLM-5.3 API Usage

Endpoint

zai/glm-5.3

Endpoint

zai/glm-5.3


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        curl -X POST https://inference.canopywave.io/v1/chat/completions \
      
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          -H "Content-Type: application/json" \
      
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          -H "Authorization: Bearer $CANOPYWAVE_API_KEY" \
      
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          -d '{
      
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            "model": "zai/glm-5.3",
      
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            "messages": [
      
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              {"role": "user", "content": "tell me a story"}
      
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            ],
      
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            "max_tokens": 1000,
      
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            "temperature": 0.7
      
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          }'