GLM-5.1 (Reasoning) vs GLM-5.3 (Low)
Which is better for the money: GLM-5.1 (Reasoning) by Z AI or GLM-5.3 (Low) by Z AI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Clear winner
Verdict
Pick GLM-5.3 (Low)
GLM-5.3 (Low) vs GLM-5.1 (Reasoning): 31.4% more intelligence, 31.9% less cost to run the AA benchmark, and 49.2% faster end-to-end.
| Metric | GLM-5.1 (Reasoning) | GLM-5.3 (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 26.1 | 34.3 | +31.4% GLM-5.3 (Low) is 31.4% more intelligent |
| Total AA cost (lower is better) | $1,486.78 | $1,012.50 | −31.9% GLM-5.3 (Low) is 31.9% cheaper |
| End-to-end time (lower is better) | 60.66s | 30.79s | −49.2% GLM-5.3 (Low) is 49.2% faster |
| Price per 1M tokens (in / out) | $1.28 / $4.07 | $1.40 / $4.40 | |
| Input modalities | Text | Text |
Today's Pareto frontier
Against the frontier
- GLM-5.1 (Reasoning) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- GLM-5.3 (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
GLM-5.1 (Reasoning)GLM-5.3 (Low)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/glm-5-1/glm-5-3-low · Markdown: /api/v1/compare/glm-5-1/glm-5-3-low?format=md · llms.txt · agent skill