GPT-5.6 Luna (Xhigh) vs GPT-6.1 Terra (High)
Which is better for the money: GPT-5.6 Luna (Xhigh) by OpenAI or GPT-6.1 Terra (High) 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 (High) scores 9.3 points higher (43.9 vs 34.6) but costs 1.3× as much to run the benchmark ($239 vs $179; both mid-range class). Pick GPT-6.1 Terra (High) when the extra intelligence is worth the premium, otherwise GPT-5.6 Luna (Xhigh).
| Metric | GPT-5.6 Luna (Xhigh) | GPT-6.1 Terra (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.6 | 43.9 | +26.9% GPT-6.1 Terra (High) is 26.9% more intelligent |
| Total AA cost (lower is better) | $179.33 | $238.53 | +33.0% GPT-6.1 Terra (High) is 33.0% more expensive |
| End-to-end time (lower is better) | 45.86s | 11.16s | −75.7% GPT-6.1 Terra (High) is 75.7% 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 (High) vs GPT-5.6 Luna (Xhigh): 26.9% more intelligence, 33.0% more cost to run the AA benchmark, and 75.7% faster 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.
- GPT-6.1 Terra (High) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
GPT-5.6 Luna (Xhigh)GPT-6.1 Terra (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/gpt-6-1-terra-high · Markdown: /api/v1/compare/gpt-5-6-luna-xhigh/gpt-6-1-terra-high?format=md · llms.txt · agent skill