GPT-6 Luna (Xhigh) vs Grok 4.6 (Low)
Which is better for the money: GPT-6 Luna (Xhigh) by OpenAI or Grok 4.6 (Low) 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 (Low) scores 0.5 points higher (35.1 vs 34.6) but costs 9.2× as much to run the benchmark ($614 vs $66.8; premium vs mid-range cost classes). They are not alternatives at one budget: pick Grok 4.6 (Low) when you need intelligence above 34.6, and GPT-6 Luna (Xhigh) when 34.6 is enough.
| Metric | GPT-6 Luna (Xhigh) | Grok 4.6 (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.6 | 35.1 | +1.4% Grok 4.6 (Low) is 1.4% more intelligent |
| Total AA cost (lower is better) | $66.81 | $613.92 | +818.9% Grok 4.6 (Low) is 9.2× more expensive |
| End-to-end time (lower is better) | 28.32s | 13.25s | −53.2% Grok 4.6 (Low) is 53.2% faster |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.6 (Low) vs GPT-6 Luna (Xhigh): 1.4% more intelligence, 818.9% more cost to run the AA benchmark, and 53.2% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (Xhigh) is on today's frontier: nothing is both smarter and cheaper.
- Grok 4.6 (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
GPT-6 Luna (Xhigh)Grok 4.6 (Low)Today's Pareto frontierEvery other model
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-luna-xhigh/grok-4-6-low · Markdown: /api/v1/compare/gpt-6-luna-xhigh/grok-4-6-low?format=md · llms.txt · agent skill