GPT-5.4 nano (Xhigh) vs GPT-5.6 Luna (Non-reasoning)
Which is better for the money: GPT-5.4 nano (Xhigh) by OpenAI or GPT-5.6 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-5.4 nano (Xhigh) scores 5.2 points higher (20.7 vs 15.5) but costs 14× as much to run the benchmark ($331 vs $23.0; mid-range vs budget cost classes). They are not alternatives at one budget: pick GPT-5.4 nano (Xhigh) when you need intelligence above 15.5, and GPT-5.6 Luna (Non-reasoning) when 15.5 is enough.
| Metric | GPT-5.4 nano (Xhigh) | GPT-5.6 Luna (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 20.7 | 15.5 | −25.1% GPT-5.6 Luna (Non-rea… is 25.1% less intelligent |
| Total AA cost (lower is better) | $331.24 | $22.97 | −93.1% GPT-5.6 Luna (Non-rea… is 93.1% cheaper |
| End-to-end time (lower is better) | 81.41s | 5.14s | −93.7% GPT-5.6 Luna (Non-rea… is 93.7% faster |
| Price per 1M tokens (in / out) | $0.20 / $1.25 | $0.20 / $1.20 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Luna (Non-reasoning) vs GPT-5.4 nano (Xhigh): 25.1% less intelligence, 93.1% less cost to run the AA benchmark, and 93.7% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.4 nano (Xhigh) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
- GPT-5.6 Luna (Non-reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
GPT-5.4 nano (Xhigh)GPT-5.6 Luna (Non-reasoning)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-5-4-nano/gpt-5-6-luna-non-reasoning · Markdown: /api/v1/compare/gpt-5-4-nano/gpt-5-6-luna-non-reasoning?format=md · llms.txt · agent skill