GLM-5.3 (Max) vs GPT-6 Luna (Xhigh)
Which is better for the money: GLM-5.3 (Max) by Z AI or GPT-6 Luna (Xhigh) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
GLM-5.3 (Max) scores 10.2 points higher (44.8 vs 34.6) but costs 37× as much to run the benchmark ($2503 vs $66.8; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GLM-5.3 (Max) when you need intelligence above 34.6, and GPT-6 Luna (Xhigh) when 34.6 is enough.
| Metric | GLM-5.3 (Max) | GPT-6 Luna (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 44.8 | 34.6 | −22.8% GPT-6 Luna (Xhigh) is 22.8% less intelligent |
| Total AA cost (lower is better) | $2,503.48 | $66.81 | −97.3% GPT-6 Luna (Xhigh) is 97.3% cheaper |
| End-to-end time (lower is better) | 27.83s | 27.06s | −2.8% GPT-6 Luna (Xhigh) is 2.8% faster |
| Price per 1M tokens (in / out) | $1.40 / $4.40 | $0.10 / $0.50 | |
| Input modalities | Text | Text, Image |
GPT-6 Luna (Xhigh) vs GLM-5.3 (Max): 22.8% less intelligence, 97.3% less cost to run the AA benchmark, and 2.8% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GLM-5.3 (Max) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
- GPT-6 Luna (Xhigh) is on today's frontier: nothing is both smarter and cheaper.
GLM-5.3 (Max)GPT-6 Luna (Xhigh)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-5-3/gpt-6-luna-xhigh · Markdown: /api/v1/compare/glm-5-3/gpt-6-luna-xhigh?format=md · llms.txt · agent skill