GPT-5.6 Luna (Max) vs GPT-6.1 Terra (Xhigh)
Which is better for the money: GPT-5.6 Luna (Max) by OpenAI or GPT-6.1 Terra (Xhigh) by OpenAI? 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
GPT-6.1 Terra (Xhigh) scores 8.1 points higher (45.4 vs 37.3) but costs 1.1× as much to run the benchmark ($365 vs $320; both mid-range class). Pick GPT-6.1 Terra (Xhigh) when the extra intelligence is worth the premium, otherwise GPT-5.6 Luna (Max).
| Metric | GPT-5.6 Luna (Max) | GPT-6.1 Terra (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.3 | 45.4 | +21.7% GPT-6.1 Terra (Xhigh) is 21.7% more intelligent |
| Total AA cost (lower is better) | $319.93 | $364.95 | +14.1% GPT-6.1 Terra (Xhigh) is 14.1% more expensive |
| End-to-end time (lower is better) | 135.46s | 18.82s | −86.1% GPT-6.1 Terra (Xhigh) is 86.1% faster |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $1.00 / $5.00 | |
| Input modalities | Text, Image | Text, Image |
GPT-6.1 Terra (Xhigh) vs GPT-5.6 Luna (Max): 21.7% more intelligence, 14.1% more cost to run the AA benchmark, and 86.1% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Max) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
- GPT-6.1 Terra (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Medium) scores 47.80 for $361.
GPT-5.6 Luna (Max)GPT-6.1 Terra (Xhigh)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/gpt-6-1-terra-xhigh · Markdown: /api/v1/compare/gpt-5-6-luna/gpt-6-1-terra-xhigh?format=md · llms.txt · agent skill