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GLM-5.3

GLM-5.3 — Technology. definition: Z.ai model announced on August 14, 2026, built on the same base model as GLM-5.2 — all the gain comes from post-training. Claims the open-weights state of the art on Terminal-Bench 3.0 (28.3 vs 17.4 for Kimi K3) and Agents' Last Exam (28.5), +50 % on the internal Z.ai Code Bench benchmark, and the state of the art across all models on CyberGym (84.5 %). Three reasoning effort levels (low, high, max, default max); disabling reasoning is no longer supported. Weights announced for two weeks after launch

Type
Technology
definition
Z.ai model announced on August 14, 2026, built on the same base model as GLM-5.2 — all the gain comes from post-training. Claims the open-weights state of the art on Terminal-Bench 3.0 (28.3 vs 17.4 for Kimi K3) and Agents' Last Exam (28.5), +50 % on the internal Z.ai Code Bench benchmark, and the state of the art across all models on CyberGym (84.5 %). Three reasoning effort levels (low, high, max, default max); disabling reasoning is no longer supported. Weights announced for two weeks after launch
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← publishes

Z.ai ORGANISATION high confidence stable Source ↗

→ is a variant of

GLM TECHNOLOGIE high confidence stable

→ replaces

GLM-5.2 TECHNOLOGIE high confidence stable Source ↗

→ is based on

GLM-5.2 TECHNOLOGIE high confidence stable Source ↗

→ uses

slime TECHNOLOGIE high confidence stable Source ↗
SAO METHODOLOGIE high confidence stable Source ↗
IndexShare TECHNOLOGIE high confidence stable Source ↗

→ observed in

Claude Code TECHNOLOGIE high confidence stable Source ↗

→ competes with

Kimi K3 TECHNOLOGIE high confidence evolving Source ↗

→ outperforms

Claude Opus 4.8 TECHNOLOGIE high confidence stable Source ↗

Cited in (1)