GLM-5.3 Fully Tested: Massive Leaps via Post-Training Scaling, Best Open Model?

WorldofAI · youtube · 2026-08-14

The video creator conducted a comprehensive test of Z.ai's newly released GLM-5.3 model. Results show that although GLM-5.3 uses the same base model as GLM-5.2, it achieved massive performance improvements primarily through scaling post-training.

The tests covered frontend code generation, long-horizon agentic tasks, and real-world 3D visualization applications. Across benchmarks like Terminal Bench and DeepSWE, GLM-5.3 performed exceptionally well against frontier models like Kimi K3, DeepSeek-V4, and GPT-5.6 Sol, demonstrating strong capabilities in understanding vague prompts and planning across long tasks.

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GLM-5.3 Fully Tested: Massive Leaps via Post-Training Scaling, Best Open Model?

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