Gemini 4 Argon (High) vs GPT-5.6 Luna (Xhigh)
Which is better for the money: Gemini 4 Argon (High) by Google or GPT-5.6 Luna (Xhigh) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Gemini 4 Argon (High) scores 18.0 points higher (52.6 vs 34.6) but costs 13× as much to run the benchmark ($2407 vs $179; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Gemini 4 Argon (High) when you need intelligence above 34.6, and GPT-5.6 Luna (Xhigh) when 34.6 is enough.
| Metric | Gemini 4 Argon (High) | GPT-5.6 Luna (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 52.6 | 34.6 | −34.2% GPT-5.6 Luna (Xhigh) is 34.2% less intelligent |
| Total AA cost (lower is better) | $2,407.24 | $179.33 | −92.6% GPT-5.6 Luna (Xhigh) is 92.6% cheaper |
| End-to-end time (lower is better) | 54.41s | 40.39s | −25.8% GPT-5.6 Luna (Xhigh) is 25.8% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $0.20 / $1.20 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Luna (Xhigh) vs Gemini 4 Argon (High): 34.2% less intelligence, 92.6% less cost to run the AA benchmark, and 25.8% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Gemini 4 Argon (High) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
- GPT-5.6 Luna (Xhigh) is off the frontier: at the same or lower cost, Claude Haiku 5.5 (Xhigh) scores 41.20 for $158.
Gemini 4 Argon (High)GPT-5.6 Luna (Xhigh)Today's Pareto frontierEvery other model
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