GLM-5.3-Flash vs GPT-5.6 Sol (Xhigh)
Which is better for the money: GLM-5.3-Flash by Z AI or GPT-5.6 Sol (Xhigh) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
GPT-5.6 Sol (Xhigh) scores 2.2 points higher (44.0 vs 41.8) but costs 6.8× as much to run the benchmark ($2082 vs $306; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GPT-5.6 Sol (Xhigh) when you need intelligence above 41.8, and GLM-5.3-Flash when 41.8 is enough.
| Metric | GLM-5.3-Flash | GPT-5.6 Sol (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 41.8 | 44.0 | +5.3% GPT-5.6 Sol (Xhigh) is 5.3% more intelligent |
| Total AA cost (lower is better) | $305.52 | $2,082.28 | +581.6% GPT-5.6 Sol (Xhigh) is 6.8× more expensive |
| End-to-end time (lower is better) | 37.69s | 37.03s | −1.8% GPT-5.6 Sol (Xhigh) is 1.8% faster |
| Price per 1M tokens (in / out) | $0.15 / $0.50 | $4.00 / $20.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Sol (Xhigh) vs GLM-5.3-Flash: 5.3% more intelligence, 581.6% more cost to run the AA benchmark, and 1.8% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GLM-5.3-Flash is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
- GPT-5.6 Sol (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GLM-5.3-FlashGPT-5.6 Sol (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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