GLM-5.3-Flash vs Kimi K3.1 Pro
Which is better for the money: GLM-5.3-Flash by Z AI or Kimi K3.1 Pro by Kimi? 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
Kimi K3.1 Pro scores 13.3 points higher (55.1 vs 41.8) but costs 10× as much to run the benchmark ($3117 vs $306; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Kimi K3.1 Pro when you need intelligence above 41.8, and GLM-5.3-Flash when 41.8 is enough.
| Metric | GLM-5.3-Flash | Kimi K3.1 Pro | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 41.8 | 55.1 | +31.8% Kimi K3.1 Pro is 31.8% more intelligent |
| Total AA cost (lower is better) | $305.52 | $3,117.31 | +920.3% Kimi K3.1 Pro is 10× more expensive |
| End-to-end time (lower is better) | 39.33s | 42.64s | +8.4% Kimi K3.1 Pro is 8.4% slower |
| Price per 1M tokens (in / out) | $0.15 / $0.50 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
Kimi K3.1 Pro vs GLM-5.3-Flash: 31.8% more intelligence, 920.3% more cost to run the AA benchmark, and 8.4% 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.
- Kimi K3.1 Pro is on today's frontier: nothing is both smarter and cheaper.
GLM-5.3-FlashKimi K3.1 ProToday's Pareto frontierOpen-weights frontierEvery other model
Matchup
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