GPT-5.6 Luna (Xhigh) vs Grok 4.7 (High)
Which is better for the money: GPT-5.6 Luna (Xhigh) by OpenAI or Grok 4.7 (High) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Trade-off
Verdict
Depends on your budget
Grok 4.7 (High) scores 11.7 points higher (46.3 vs 34.6) but costs 19× as much to run the benchmark ($3473 vs $179; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Grok 4.7 (High) when you need intelligence above 34.6, and GPT-5.6 Luna (Xhigh) when 34.6 is enough.
| Metric | GPT-5.6 Luna (Xhigh) | Grok 4.7 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.6 | 46.3 | +33.8% Grok 4.7 (High) is 33.8% more intelligent |
| Total AA cost (lower is better) | $179.33 | $3,473.49 | +1836.9% Grok 4.7 (High) is 19× more expensive |
| End-to-end time (lower is better) | 39.18s | 51.11s | +30.4% Grok 4.7 (High) is 30.4% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.7 (High) vs GPT-5.6 Luna (Xhigh): 33.8% more intelligence, 1836.9% more cost to run the AA benchmark, and 30.4% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Terra (Medium) scores 41.30 for $175.
- Grok 4.7 (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
GPT-5.6 Luna (Xhigh)Grok 4.7 (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-5-6-luna-xhigh/grok-4-7-high · Markdown: /api/v1/compare/gpt-5-6-luna-xhigh/grok-4-7-high?format=md · llms.txt · agent skill