GLM-5.3-Flash vs gpt-oss-120b (High)
Which is better for the money: GLM-5.3-Flash by Z AI or gpt-oss-120b (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
GLM-5.3-Flash scores 30.2 points higher (41.8 vs 11.6) but costs 2.5× as much to run the benchmark ($306 vs $123; both mid-range class). Pick GLM-5.3-Flash when the extra intelligence is worth the premium, otherwise gpt-oss-120b (High).
| Metric | GLM-5.3-Flash | gpt-oss-120b (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 41.8 | 11.6 | −72.2% gpt-oss-120b (High) is 72.2% less intelligent |
| Total AA cost (lower is better) | $305.52 | $122.71 | −59.8% gpt-oss-120b (High) is 59.8% cheaper |
| End-to-end time (lower is better) | 38.89s | 11.55s | −70.3% gpt-oss-120b (High) is 70.3% faster |
| Price per 1M tokens (in / out) | $0.15 / $0.50 | $0.15 / $0.60 | |
| Input modalities | Text, Image | Text |
gpt-oss-120b (High) vs GLM-5.3-Flash: 72.2% less intelligence, 59.8% less cost to run the AA benchmark, and 70.3% 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-oss-120b (High) is off the frontier: at the same or lower cost, GPT-6 Luna (Max) scores 38.10 for $122.
GLM-5.3-Flashgpt-oss-120b (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-oss-120b · Markdown: /api/v1/compare/glm-5-3-flash/gpt-oss-120b?format=md · llms.txt · agent skill