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GLM 5.3

GLM 5.3

Frontier Z.ai

GLM-5.3 uses the same base model as GLM-5.2 — every gain comes from post-training. Compared with GLM-5.2, it is significantly better at complex coding and long-horizon agentic tasks. 743B parameter MoE with a 1M-token context window.

Try on Simtheory
Qwen 3.8 Max Frontier Claude 4.5 Sonnet Frontier Claude 4.5 Sonnet (thinking) Frontier Claude 4.6 Opus Frontier Claude 4.6 Opus Max Frontier Claude 4.6 Sonnet Frontier Claude 4.6 Sonnet Max Frontier Claude 4.7 Opus Frontier Claude 4.7 Opus Max Frontier Claude Fable 5 Frontier

Specifications

Context window 1,000,000 tokens
Max output 131,072 tokens
Knowledge cutoff June 2026
Multipart messages Yes
Vision capabilities No

Default Parameters

Temperature 0.6
Top P 1.0
Frequency penalty 0.0
Presence penalty 0.0
Top K 40

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GLM 5.2

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GLM-5.2 introduces a robust 1M-token context and advanced, multi-effort coding capabilities to significantly enhance performance on long-horizon tasks. Its new …

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