GLM-5.2 (Max) vs GPT-5.5 (Xhigh)
Which is better for the money: GLM-5.2 (Max) by Z AI or GPT-5.5 (Xhigh) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
GPT-5.5 (Xhigh) scores 4.7 points higher (38.4 vs 33.7) but costs 2.5× as much to run the benchmark ($5294 vs $2097; both flagship class). Pick GPT-5.5 (Xhigh) when the extra intelligence is worth the premium, otherwise GLM-5.2 (Max).
| Metric | GLM-5.2 (Max) | GPT-5.5 (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 33.7 | 38.4 | +13.9% GPT-5.5 (Xhigh) is 13.9% more intelligent |
| Total AA cost (lower is better) | $2,097.29 | $5,294.36 | +152.4% GPT-5.5 (Xhigh) is 2.5× more expensive |
| End-to-end time (lower is better) | 30.10s | 44.96s | +49.4% GPT-5.5 (Xhigh) is 49.4% slower |
| Price per 1M tokens (in / out) | $1.40 / $4.40 | $5.00 / $30.0 | |
| Input modalities | Text | Text, Image |
GPT-5.5 (Xhigh) vs GLM-5.2 (Max): 13.9% more intelligence, 152.4% more cost to run the AA benchmark, and 49.4% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GLM-5.2 (Max) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- GPT-5.5 (Xhigh) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
GLM-5.2 (Max)GPT-5.5 (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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