GLM-5.3

Name: GLM-5.3
Author: Zhipu AI

GLM-5.3 is the most capable open-weights model for coding, with a 50% improvement over GLM-5.2 on our in-house Z.ai Code Bench.

Specs

Model

Family: GLM
Variant: 5.3
Weights: Proprietary

Limits

Context: 1,000,000 tokens
Max output: 131,072 tokens

Modalities

Input: Text
Output: Text

Pricing

Input: $1.4 / 1M
Output: $4.4 / 1M
Cache read: $0.26 / 1M
Cache write: Free

Capabilities

Reasoning: Yes
Reasoning control: Effort levels
Tool calling: Yes
Attachments: No

Dates

Announced: 14 Aug 2026
Released: 14 Aug 2026

Articles

All articles

14 Aug 2026

GLM-5.3: Frontier Coding with Emergent Cyber Capabilities

Z.ai releases GLM-5.3, a post-training-only upgrade on the GLM-5.2 base model, claiming open-source SOTA on Terminal Bench 3.0 and Agents' Last Exam plus state-of-the-art vulnerability discovery on CyberGym.

Z.ai

z.ai

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