GLM-5.1 (Reasoning) vs GPT-6.1 Sol (Xhigh)
Which is better for the money: GLM-5.1 (Reasoning) by Z AI or GPT-6.1 Sol (Xhigh) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Clear winner
Verdict
Pick GPT-6.1 Sol (Xhigh)
GPT-6.1 Sol (Xhigh) vs GLM-5.1 (Reasoning): 95.4% more intelligence, 55.5% less cost to run the AA benchmark, and 36.5% slower end-to-end.
| Metric | GLM-5.1 (Reasoning) | GPT-6.1 Sol (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 26.1 | 51.0 | +95.4% GPT-6.1 Sol (Xhigh) is 95.4% more intelligent |
| Total AA cost (lower is better) | $1,486.78 | $662.28 | −55.5% GPT-6.1 Sol (Xhigh) is 55.5% cheaper |
| End-to-end time (lower is better) | 63.24s | 86.31s | +36.5% GPT-6.1 Sol (Xhigh) is 36.5% slower |
| Price per 1M tokens (in / out) | $1.28 / $4.07 | $2.00 / $10.0 | |
| Input modalities | Text | Text, Image |
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.
- GPT-6.1 Sol (Xhigh) is on today's frontier: nothing is both smarter and cheaper.
GLM-5.1 (Reasoning)GPT-6.1 Sol (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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