Gemini 3.5 Flash (High) vs GPT-5.6 Luna (Xhigh)
Which is better for the money: Gemini 3.5 Flash (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.
Clear winner
Verdict
Pick GPT-5.6 Luna (Xhigh)
GPT-5.6 Luna (Xhigh) vs Gemini 3.5 Flash (High): 6.1% more intelligence, 95.8% less cost to run the AA benchmark, and 135.9% slower end-to-end.
| Metric | Gemini 3.5 Flash (High) | GPT-5.6 Luna (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 32.6 | 34.6 | +6.1% GPT-5.6 Luna (Xhigh) is 6.1% more intelligent |
| Total AA cost (lower is better) | $4,222.12 | $179.33 | −95.8% GPT-5.6 Luna (Xhigh) is 95.8% cheaper |
| End-to-end time (lower is better) | 17.12s | 40.39s | +135.9% GPT-5.6 Luna (Xhigh) is 135.9% slower |
| Price per 1M tokens (in / out) | $1.50 / $9.00 | $0.20 / $1.20 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
Today's Pareto frontier
Against the frontier
- Gemini 3.5 Flash (High) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
- 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 3.5 Flash (High)GPT-5.6 Luna (Xhigh)Today's Pareto frontierEvery other model
Matchup
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