GLM-5.3 (Low) vs GPT-6 Luna (Xhigh)
Which is better for the money: GLM-5.3 (Low) 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.
Clear winner
Verdict
Pick GPT-6 Luna (Xhigh)
GPT-6 Luna (Xhigh) vs GLM-5.3 (Low): 0.9% more intelligence, 93.4% less cost to run the AA benchmark, and 4.0% faster end-to-end.
| Metric | GLM-5.3 (Low) | GPT-6 Luna (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.3 | 34.6 | +0.9% GPT-6 Luna (Xhigh) is 0.9% more intelligent |
| Total AA cost (lower is better) | $1,012.50 | $66.81 | −93.4% GPT-6 Luna (Xhigh) is 93.4% cheaper |
| End-to-end time (lower is better) | 29.49s | 28.32s | −4.0% GPT-6 Luna (Xhigh) is 4.0% faster |
| Price per 1M tokens (in / out) | $1.40 / $4.40 | $0.10 / $0.50 | |
| Input modalities | Text | Text, Image |
Today's Pareto frontier
Against the frontier
- GLM-5.3 (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
- GPT-6 Luna (Xhigh) is on today's frontier: nothing is both smarter and cheaper.
GLM-5.3 (Low)GPT-6 Luna (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
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