GPT-5.6 Luna (High) vs GPT-5.6 Terra (High)
Which is better for the money: GPT-5.6 Luna (High) by OpenAI or GPT-5.6 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-5.6 Terra (High) scores 2.1 points higher (34.2 vs 32.1) but costs 7.1× as much to run the benchmark ($768 vs $108; premium vs mid-range cost classes). They are not alternatives at one budget: pick GPT-5.6 Terra (High) when you need intelligence above 32.1, and GPT-5.6 Luna (High) when 32.1 is enough.
| Metric | GPT-5.6 Luna (High) | GPT-5.6 Terra (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 32.1 | 34.2 | +6.5% GPT-5.6 Terra (High) is 6.5% more intelligent |
| Total AA cost (lower is better) | $108.15 | $767.78 | +609.9% GPT-5.6 Terra (High) is 7.1× more expensive |
| End-to-end time (lower is better) | 16.30s | 7.30s | −55.2% GPT-5.6 Terra (High) is 55.2% faster |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $2.00 / $12.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Terra (High) vs GPT-5.6 Luna (High): 6.5% more intelligence, 609.9% more cost to run the AA benchmark, and 55.2% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (High) is off the frontier: at the same or lower cost, Claude Haiku 5.5 (High) scores 37.80 for $94.1.
- GPT-5.6 Terra (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
GPT-5.6 Luna (High)GPT-5.6 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-high/gpt-5-6-terra-high · Markdown: /api/v1/compare/gpt-5-6-luna-high/gpt-5-6-terra-high?format=md · llms.txt · agent skill