Model comparison

GLM 5.3 vs GLM 5.3 Flash

Compare pricing, context windows and capabilities from OpenRouter. Open either model’s page to check availability and try it online.

z-aiGLM 5.3newz-ai/glm-5.3z-aiGLM 5.3 Flashnewz-ai/glm-5.3-flash

Measured intelligence and task cost

An efficiency pick and its closest intelligence leader by benchmark score. Artificial Analysis index v4.3, updated 2026-09-21.

GLM 5.3 Flash: 41.8 intelligence · $0.253 / AA task · Open weights

GLM-5.3 (max): 44.8 intelligence · $2.01 / AA task · Open weights

Highest reasoning effort with both measurements available. Benchmark task costs are not OpenCraft task quotes; your settings and workload can differ.

Input price /M$1.40$0.159.3× cheaper

Output price /M$4.40$0.508.8× cheaper

Cache read /M$0.26$0.055.2× cheaper

Context window1M1M

Catalog date18 Aug 202626 Aug 2026

What the same turn costs

Estimates from published token rates — stated token counts, not measurements.

Quick answer2K tokens in, 600 outGLM 5.3$0.0054GLM 5.3 Flash$0.00069.1× cheaper

10-slide deck build60K tokens in, 9K outGLM 5.3$0.124GLM 5.3 Flash$0.0139.2× cheaper

150-page PDF read200K tokens in, 4K outGLM 5.3$0.298GLM 5.3 Flash$0.0329.3× cheaper

Capabilities

Bothtool-usereasoning

Only GLM 5.3 Flashvision

GLM 5.3: text → text · GLM 5.3 Flash: text, image, video → text

Which model should you use?

Start with the token cost for your workload, the context you need, and supported input types. A lower price or larger context window does not establish better answer quality.

To compare answers, open each model in a separate chat and use the same prompt. Token tables use published specs and estimates; any measured AA results above are a separate benchmark.

Try GLM 5.3 — pricing and availability Try GLM 5.3 Flash — pricing and availability