GLM-5.3 ties top open models via post-training; release paused for safety
DeepLearningAI · x · 2026-08-31
GLM-5.3 scored 60 on the Artificial Analysis Intelligence Index, tying for the top spot among open weights models. Its gains came entirely from fine-tuning GLM-5.2 rather than a new base architecture. Training inside software engineering environments led to emergent cybersecurity capabilities (84.5% on CyberGym). The model's release is temporarily paused for security evaluation due to unexpected exploit generation skills.
Related event: GLM-5.3 Tops Benchmarks via Post-Training, Held Back Over Cyber Risk(2 posts)→
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