GLM-5.1 (Reasoning) vs Grok 4.5 (High)
Which is better for the money: GLM-5.1 (Reasoning) by Z AI or Grok 4.5 (High) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Clear winner
Verdict
Pick Grok 4.5 (High)
Grok 4.5 (High) vs GLM-5.1 (Reasoning): 48.7% more intelligence, 16.3% less cost to run the AA benchmark, and 69.0% faster end-to-end.
| Metric | GLM-5.1 (Reasoning) | Grok 4.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 26.1 | 38.8 | +48.7% Grok 4.5 (High) is 48.7% more intelligent |
| Total AA cost (lower is better) | $1,486.78 | $1,243.85 | −16.3% Grok 4.5 (High) is 16.3% cheaper |
| End-to-end time (lower is better) | 60.76s | 18.82s | −69.0% Grok 4.5 (High) is 69.0% faster |
| Price per 1M tokens (in / out) | $1.28 / $4.07 | $2.00 / $6.00 | |
| 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.
- Grok 4.5 (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GLM-5.1 (Reasoning)Grok 4.5 (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-5-1/grok-4-5 · Markdown: /api/v1/compare/glm-5-1/grok-4-5?format=md · llms.txt · agent skill