GPT-5.6 Luna (High) vs GPT-5.6 Luna (Medium)
Which is better for the money: GPT-5.6 Luna (High) by OpenAI or GPT-5.6 Luna (Medium) 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 (High) scores 7.1 points higher (32.1 vs 25.0) but costs 2.4× as much to run the benchmark ($108 vs $44.3; mid-range vs budget cost classes). Pick GPT-5.6 Luna (High) when the extra intelligence is worth the premium, otherwise GPT-5.6 Luna (Medium).
| Metric | GPT-5.6 Luna (High) | GPT-5.6 Luna (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 32.1 | 25.0 | −22.1% GPT-5.6 Luna (Medium) is 22.1% less intelligent |
| Total AA cost (lower is better) | $108.15 | $44.32 | −59.0% GPT-5.6 Luna (Medium) is 59.0% cheaper |
| End-to-end time (lower is better) | 16.30s | 6.65s | −59.2% GPT-5.6 Luna (Medium) is 59.2% faster |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $0.20 / $1.20 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Luna (Medium) vs GPT-5.6 Luna (High): 22.1% less intelligence, 59.0% less cost to run the AA benchmark, and 59.2% 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 Luna (Medium) is off the frontier: at the same or lower cost, GPT-6 Luna (Medium) scores 29.90 for $31.2.
GPT-5.6 Luna (High)GPT-5.6 Luna (Medium)Today's Pareto frontierEvery other model
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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-luna-medium · Markdown: /api/v1/compare/gpt-5-6-luna-high/gpt-5-6-luna-medium?format=md · llms.txt · agent skill