GLM-5.3-Flash vs GPT-5.5 (High)
Which is better for the money: GLM-5.3-Flash by Z AI or GPT-5.5 (High) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Clear winner
Verdict
Pick GLM-5.3-Flash
GPT-5.5 (High) vs GLM-5.3-Flash: 11.5% less intelligence, 1016.4% more cost to run the AA benchmark, and 47.6% faster end-to-end.
| Metric | GLM-5.3-Flash | GPT-5.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 41.8 | 37.0 | −11.5% GPT-5.5 (High) is 11.5% less intelligent |
| Total AA cost (lower is better) | $305.52 | $3,410.76 | +1016.4% GPT-5.5 (High) is 11× more expensive |
| End-to-end time (lower is better) | 38.89s | 20.37s | −47.6% GPT-5.5 (High) is 47.6% faster |
| Price per 1M tokens (in / out) | $0.15 / $0.50 | $5.00 / $30.0 | |
| Input modalities | Text, Image | Text, Image |
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-5.5 (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
GLM-5.3-FlashGPT-5.5 (High)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/glm-5-3-flash/gpt-5-5-high · Markdown: /api/v1/compare/glm-5-3-flash/gpt-5-5-high?format=md · llms.txt · agent skill