GPT-5.6 Luna (Max) vs GPT-6.1 Terra (Low)
Which is better for the money: GPT-5.6 Luna (Max) by OpenAI or GPT-6.1 Terra (Low) 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-5.6 Luna (Max) scores 1.1 points higher (37.3 vs 36.2) but costs 2.8× as much to run the benchmark ($320 vs $115; both mid-range class). Pick GPT-5.6 Luna (Max) when the extra intelligence is worth the premium, otherwise GPT-6.1 Terra (Low).
| Metric | GPT-5.6 Luna (Max) | GPT-6.1 Terra (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.3 | 36.2 | −2.9% GPT-6.1 Terra (Low) is 2.9% less intelligent |
| Total AA cost (lower is better) | $319.93 | $114.52 | −64.2% GPT-6.1 Terra (Low) is 64.2% cheaper |
| End-to-end time (lower is better) | 124.25s | 6.78s | −94.5% GPT-6.1 Terra (Low) is 94.5% 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 (Low) vs GPT-5.6 Luna (Max): 2.9% less intelligence, 64.2% less cost to run the AA benchmark, and 94.5% 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 (Low) is off the frontier: at the same or lower cost, MiMo-V2.6-Flash scores 37.90 for $110.
GPT-5.6 Luna (Max)GPT-6.1 Terra (Low)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-low · Markdown: /api/v1/compare/gpt-5-6-luna/gpt-6-1-terra-low?format=md · llms.txt · agent skill