GLM-5.3-Flash vs GPT-5.6 Sol (High)
Which is better for the money: GLM-5.3-Flash by Z AI or GPT-5.6 Sol (High) 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 (High) scores 0.5 points higher (42.3 vs 41.8) but costs 4.9× as much to run the benchmark ($1487 vs $306; premium vs mid-range cost classes). They are not alternatives at one budget: pick GPT-5.6 Sol (High) 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 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 41.8 | 42.3 | +1.2% GPT-5.6 Sol (High) is 1.2% more intelligent |
| Total AA cost (lower is better) | $305.52 | $1,487.34 | +386.8% GPT-5.6 Sol (High) is 4.9× more expensive |
| End-to-end time (lower is better) | 38.43s | 13.86s | −63.9% GPT-5.6 Sol (High) is 63.9% 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 (High) vs GLM-5.3-Flash: 1.2% more intelligence, 386.8% more cost to run the AA benchmark, and 63.9% 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 (High) 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 (High)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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