GLM-5.1 (Reasoning) vs GPT-6.1 Terra (Non-reasoning)
Which is better for the money: GLM-5.1 (Reasoning) by Z AI or GPT-6.1 Terra (Non-reasoning) 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 (Non-reasoning)
GPT-6.1 Terra (Non-reasoning) vs GLM-5.1 (Reasoning): 28.4% more intelligence, 87.3% less cost to run the AA benchmark, and 88.7% faster end-to-end.
| Metric | GLM-5.1 (Reasoning) | GPT-6.1 Terra (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 26.1 | 33.5 | +28.4% GPT-6.1 Terra (Non-re… is 28.4% more intelligent |
| Total AA cost (lower is better) | $1,211.83 | $153.58 | −87.3% GPT-6.1 Terra (Non-re… is 87.3% cheaper |
| End-to-end time (lower is better) | 58.41s | 6.61s | −88.7% GPT-6.1 Terra (Non-re… is 88.7% 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 (Non-reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Max) scores 38.10 for $122.
GLM-5.1 (Reasoning)GPT-6.1 Terra (Non-reasoning)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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