GLM-5.2 Tops Fine-Tuning Benchmark Amid Controversy, Authors Clarify: No Distillation of Claude

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According to monitoring by Dongcha Beating, the open-source model GLM-5.2 has topped the self-fine-tuning benchmark PostTrainBench, but has faced criticism from the challenger scaling01 for lacking practical value. He pointed out that the model's ranking jumped from 22nd to 1st in just a few months, which is highly unusual, and that the testing lacks a hidden set, making it easy for agents to exploit ranking optimization, resulting in models that are difficult to implement in the real world. However, supporters countered that it is unrealistic to expect agents to complete general fine-tuning under the constraint of a single H100 GPU for 10 hours, and that targeted optimization is a norm in machine learning. Public logs show that GLM-5.2 has a clear experimental logic, can automatically collect data from different sampling hypotheses, autonomously plans a complete chain for establishing performance baselines, fine-tuning, and filtering data using rejection sampling, while attempting to avoid overfitting in the reasoning chain. The greater value of this controversy lies in the fact that the publicly available operational trajectory originally intended to assess fine-tuning capabilities unexpectedly debunked industry rumors about domestic large models being heavily distilled from Claude. Benchmark author Maksym Andriushchenko noted after reviewing the GLM-5.2 logs that the model has essential differences from Claude in data collection, strategy combinations, and decision paths, showing no signs of imitation or distillation. The transparency of third-party benchmarks has instead become the most direct window for open-source large models to demonstrate their original research and development capabilities.
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