WhichAI / Models / GLM-5.3-Flash

GLM-5.3-Flash

· verified October 14, 2026

public free paid api open-weights in Generator coding agents value vision long-context

Provider

Statuspublic

AA Intelligence Index41.8 (official, read October 14, 2026)

Released2026-08-26

Context window1M

ModalitiesText + vision

API price $/1M (in / out)$0.15 / $0.5 · 320B-A18B MoE, MIT licence

Speedn/a

AccessReleased August 26, 2026 · open weights under MIT · API $0.15/$0.50 per 1M tokens · free chat at chat.z.ai

In one line

The most capable freely downloadable model on this table: 320B-A18B, MIT licence, 1M multimodal context, and $0.15/$0.50 hosted - roughly a thirtieth of what the frontier charges for a score within six points of it. If one entry explains why the open-weight gap stopped mattering in 2026, it is this one.

Coding89

Reasoning84

Writing70

Agents & tools86

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

Alternatives worth a look

Claude Opus 4.8 (Anthropic) · AA 41.8Claude Pro $20/mo · API
GPT-5.6 Terra (OpenAI) · AA 42.1Released July 9, 2026 · API $2.50/$15 per 1M tokens
Ling 3.1 Flash (Ant Group) · AA 41.1API $0.075/$0.225 per 1M tokens on OpenRouter · listed October 2, 2026

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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).