WhichAI / Models / GLM-5.3

GLM-5.3

· verified October 14, 2026

public api in Generator open-weights coding reasoning agents

Provider

Statuspublic

AA Intelligence Index44.8 (official, read October 14, 2026)

Released2026-08-14

Context window1.05M

Modalitiesn/a

API price $/1M (in / out)$0.12 / $4.8 (OpenRouter) · 743B post-trained base · weights held back pending a staged safety review · price not published

Speedn/a

AccessReleased August 14, 2026 · staged access · open weights NOT released at launch (unlike every previous GLM) · API price not published

In one line

Z.ai's 743B flagship, among the highest AA scores any Chinese lab has reached, with 84.5% on CyberGym and 54.4% on ExploitBench. The break with tradition matters more than the score: weights are held back behind a staged safety review, so for now GLM-5.3 is not the open model its version number suggests. The Flash sibling is.

Coding91

Reasoning88

Writing72

Agents & tools88

Category scores (0-100) are WhichAI blended ratings: public category leaderboards plus editorial judgment. Guidance, not official measurements.

Alternatives worth a look

Grok 4.6 (xAI) · AA 44.3Released August 12, 2026 · API $2/$6 per 1M tokens ($0.50 cached) · in Grok Build and Cursor · SuperGrok subscription
Qwen3.8 Max (0902) (Alibaba) · AA 45.4API $2/$6 per 1M tokens on OpenRouter · listed September 3, 2026
Kimi K3 (Moonshot AI) · AA 43.6API $0.58/$15 per 1M tokens ($0.30 cached) · free kimi.com chat · open weights on Hugging Face (July 27, Modified MIT)

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Artificial Analysis Intelligence Index, official scale (the number published on artificialanalysis.ai), relayed by OpenRouter and refreshed automatically: last read October 14, 2026. 209 models carry a current official measurement. A value marked ~ is converted from an earlier snapshot because no current measurement is published; an unmeasured model is never ranked. Context, price, modality and listing dates come from the public OpenRouter model list (refreshed automatically on the live site; static copy retrieved October 3, 2026) and vendor pages. Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (the Ranking chapter and About > Methodology).