GLM-5.3-Flash vs GPT-6 Astra (Xhigh)
Which is better for the money: GLM-5.3-Flash by Z AI or GPT-6 Astra (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-6 Astra (Xhigh) scores 10.6 points higher (52.4 vs 41.8) but costs 12× as much to run the benchmark ($3803 vs $306; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GPT-6 Astra (Xhigh) when you need intelligence above 41.8, and GLM-5.3-Flash when 41.8 is enough.
| Metric | GLM-5.3-Flash | GPT-6 Astra (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 41.8 | 52.4 | +25.4% GPT-6 Astra (Xhigh) is 25.4% more intelligent |
| Total AA cost (lower is better) | $305.52 | $3,802.98 | +1144.8% GPT-6 Astra (Xhigh) is 12× more expensive |
| End-to-end time (lower is better) | 39.33s | 163.27s | +315.1% GPT-6 Astra (Xhigh) is 315.1% slower |
| Price per 1M tokens (in / out) | $0.15 / $0.50 | $10.0 / $50.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Astra (Xhigh) vs GLM-5.3-Flash: 25.4% more intelligence, 1144.8% more cost to run the AA benchmark, and 315.1% slower 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-6 Astra (Xhigh) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
GLM-5.3-FlashGPT-6 Astra (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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