GPT-6 Luna (Max) vs Grok 4.5 (High)
Which is better for the money: GPT-6 Luna (Max) by OpenAI 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.
Trade-off
Verdict
Depends on your budget
Grok 4.5 (High) scores 0.7 points higher (38.8 vs 38.1) but costs 10× as much to run the benchmark ($1244 vs $122; premium vs mid-range cost classes). They are not alternatives at one budget: pick Grok 4.5 (High) when you need intelligence above 38.1, and GPT-6 Luna (Max) when 38.1 is enough.
| Metric | GPT-6 Luna (Max) | Grok 4.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.1 | 38.8 | +1.8% Grok 4.5 (High) is 1.8% more intelligent |
| Total AA cost (lower is better) | $122.05 | $1,243.85 | +919.1% Grok 4.5 (High) is 10× more expensive |
| End-to-end time (lower is better) | 86.79s | 19.45s | −77.6% Grok 4.5 (High) is 77.6% faster |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.5 (High) vs GPT-6 Luna (Max): 1.8% more intelligence, 919.1% more cost to run the AA benchmark, and 77.6% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (Max) is on today's frontier: nothing is both smarter and cheaper.
- Grok 4.5 (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-6 Luna (Max)Grok 4.5 (High)Today's Pareto frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-luna/grok-4-5 · Markdown: /api/v1/compare/gpt-6-luna/grok-4-5?format=md · llms.txt · agent skill