GLM-5.1 (Reasoning) vs GPT-6.1 Terra (Xhigh)
Which is better for the money: GLM-5.1 (Reasoning) by Z AI or GPT-6.1 Terra (Xhigh) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Clear winner
Verdict
Pick GPT-6.1 Terra (Xhigh)
GPT-6.1 Terra (Xhigh) vs GLM-5.1 (Reasoning): 73.9% more intelligence, 69.9% less cost to run the AA benchmark, and 67.2% faster end-to-end.
| Metric | GLM-5.1 (Reasoning) | GPT-6.1 Terra (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 26.1 | 45.4 | +73.9% GPT-6.1 Terra (Xhigh) is 73.9% more intelligent |
| Total AA cost (lower is better) | $1,211.83 | $364.95 | −69.9% GPT-6.1 Terra (Xhigh) is 69.9% cheaper |
| End-to-end time (lower is better) | 57.43s | 18.82s | −67.2% GPT-6.1 Terra (Xhigh) is 67.2% faster |
| Price per 1M tokens (in / out) | $1.28 / $4.07 | $1.00 / $5.00 | |
| Input modalities | Text | Text, Image |
Today's Pareto frontier
Against the frontier
- GLM-5.1 (Reasoning) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- GPT-6.1 Terra (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Medium) scores 47.80 for $361.
GLM-5.1 (Reasoning)GPT-6.1 Terra (Xhigh)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-5-1/gpt-6-1-terra-xhigh · Markdown: /api/v1/compare/glm-5-1/gpt-6-1-terra-xhigh?format=md · llms.txt · agent skill