Z.ai Ships GLM-5.3 Without Retraining the Base Model: Better at Complex Coding and Long-Horizon Tasks
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TL;DR
Z.ai released GLM-5.3 on August 14, 2026, without retraining the base model, focusing instead on scaled post-training for improved performance in complex coding and long-horizon tasks. This update significantly boosts Terminal-Bench 3.0 and DeepSWE v1.1 scores, highlighting advancements in handling more intricate and extended task environments.
Detailed Summary
Z.ai released GLM-5.3 on August 14, 2026, without retraining the base model, focusing instead on scaled post-training for improved performance in complex coding and long-horizon tasks. The update significantly boosted Terminal-Bench 3.0 scores from 4.6 to 28.3 and DeepSWE v1.1 scores from 46.2 to an unspecified higher number, indicating enhanced capabilities in handling more intricate and extended task environments.
Key Points
- • Z.ai released GLM-5.3 on August 14, 2026.
- • The base model remains unchanged from GLM-5.2.
- • Improvements come from scaled post-training enhancements.
- • Terminal-Bench 3.0 score increased to 28.3.
- • DeepSWE v1.1 performance improved significantly.