GLM 5.3
Released on August 14, 2026
Changes from previous version
Same 753B MoE base as GLM-5.2; all gains come from post-training. Stronger long-horizon coding at every effort level, with cyber scores more than doubling on exploitation benchmarks.
Release Summary
Post-training upgrade on the same base as GLM-5.2. Z.ai reports a 50% gain on its in-house Code Bench, open-weight SOTA on Terminal-Bench 3.0 (28.3 vs 4.6) and DeepSWE v1.1 (66.9 vs 46.2), plus emergent cyber capability (CyberGym 84.5%, ExploitBench 54.4%). Weights shipped two weeks later under the GLM-5.3 License.
Timeline
August 28, 2026
Open weights published
Z.ai publishes GLM-5.3 weights on Hugging Face under the GLM-5.3 License after safety evaluation.
August 14, 2026
GLM-5.3 released
Z.ai launches GLM-5.3 on the GLM Coding Plan and API as a post-training upgrade of GLM-5.2.