GPT-6.1 Terra (Xhigh) vs GPT-6 Luna (Non-reasoning)
Which is better for the money: GPT-6.1 Terra (Xhigh) by OpenAI or GPT-6 Luna (Non-reasoning) 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 26.9 points higher (45.4 vs 18.5) but costs 19× as much to run the benchmark ($365 vs $19.2; mid-range vs budget cost classes). They are not alternatives at one budget: pick GPT-6.1 Terra (Xhigh) when you need intelligence above 18.5, and GPT-6 Luna (Non-reasoning) when 18.5 is enough.
| Metric | GPT-6.1 Terra (Xhigh) | GPT-6 Luna (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 45.4 | 18.5 | −59.3% GPT-6 Luna (Non-reaso… is 59.3% less intelligent |
| Total AA cost (lower is better) | $364.95 | $19.16 | −94.7% GPT-6 Luna (Non-reaso… is 94.7% cheaper |
| End-to-end time (lower is better) | 18.82s | 5.07s | −73.1% GPT-6 Luna (Non-reaso… is 73.1% faster |
| Price per 1M tokens (in / out) | $1.00 / $5.00 | $0.10 / $0.50 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Luna (Non-reasoning) vs GPT-6.1 Terra (Xhigh): 59.3% less intelligence, 94.7% less cost to run the AA benchmark, and 73.1% faster end-to-end.
Today's Pareto frontier
Against the frontier
- 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-6 Luna (Non-reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
GPT-6.1 Terra (Xhigh)GPT-6 Luna (Non-reasoning)Today's Pareto frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-1-terra-xhigh/gpt-6-luna-non-reasoning · Markdown: /api/v1/compare/gpt-6-1-terra-xhigh/gpt-6-luna-non-reasoning?format=md · llms.txt · agent skill