GPT-6 Luna (Max) vs Grok 4.6 (Xhigh)
Which is better for the money: GPT-6 Luna (Max) by OpenAI or Grok 4.6 (Xhigh) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Grok 4.6 (Xhigh) scores 6.1 points higher (44.2 vs 38.1) but costs 18× as much to run the benchmark ($2242 vs $122; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Grok 4.6 (Xhigh) when you need intelligence above 38.1, and GPT-6 Luna (Max) when 38.1 is enough.
| Metric | GPT-6 Luna (Max) | Grok 4.6 (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.1 | 44.2 | +16.0% Grok 4.6 (Xhigh) is 16.0% more intelligent |
| Total AA cost (lower is better) | $122.05 | $2,241.91 | +1736.9% Grok 4.6 (Xhigh) is 18× more expensive |
| End-to-end time (lower is better) | 90.27s | 40.33s | −55.3% Grok 4.6 (Xhigh) is 55.3% faster |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.6 (Xhigh) vs GPT-6 Luna (Max): 16.0% more intelligence, 1736.9% more cost to run the AA benchmark, and 55.3% 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 4.6 (Xhigh) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
GPT-6 Luna (Max)Grok 4.6 (Xhigh)Today's Pareto frontierEvery other model
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