88Z AI, 19 August — The Zhipu GLM-5.3 API officially launched today, specializing in complex coding, cybersecurity, and long-horizon tasks. Scoring 60 on the AA Comprehensive Intelligence Index, it rivals closed-source flagships like Claude Fable 5 and GPT-5.6 Sol, while tying with Kimi K3 for the top spot among open-source models. GLM-5.3 achieves frontier-level performance with smaller parameter sizes and the lowest single-task costs, keeping pricing consistent with the previous generation. Model weights are sche
At a glance
- GLM-5.3 scores 60 on the AA Index, rivaling closed-source flagships and tying Kimi K3 for top open-source status
- Achieves frontier performance with small parameters and low costs, maintains previous pricing, with weights open-sourcing next Friday
The update
Zhipu AI announced that the GLM-5.3 API is now commercially available. This version significantly enhances capabilities in complex code generation, cybersecurity analysis, and long-horizon task planning. In the authoritative AA Comprehensive Intelligence Index, GLM-5.3 scored 60, placing it in the same tier as top closed-source models like Claude Fable 5 and GPT-5.6 Sol, while tying with Kimi K3 for the leading position among open-source models. Notably, GLM-5.3 achieves frontier-level performance with a smaller parameter size and maintains the lowest single-task costs, with pricing remaining consistent with the previous generation. Zhipu confirmed that the model weights will be open-sourced next Friday. Developers can currently access the model via API and use it directly on mainstream coding platforms such as ZCode.
Sources & editorial note
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