Gemini 3.5 Flash (High) vs GPT-6 Luna (Medium)
Which is better for the money: Gemini 3.5 Flash (High) by Google or GPT-6 Luna (Medium) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
Gemini 3.5 Flash (High) scores 2.7 points higher (32.6 vs 29.9) but costs 135× as much to run the benchmark ($4222 vs $31.2; flagship vs budget cost classes). They are not alternatives at one budget: pick Gemini 3.5 Flash (High) when you need intelligence above 29.9, and GPT-6 Luna (Medium) when 29.9 is enough.
| Metric | Gemini 3.5 Flash (High) | GPT-6 Luna (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 32.6 | 29.9 | −8.3% GPT-6 Luna (Medium) is 8.3% less intelligent |
| Total AA cost (lower is better) | $4,222.12 | $31.17 | −99.3% GPT-6 Luna (Medium) is 99.3% cheaper |
| End-to-end time (lower is better) | 16.63s | 8.25s | −50.4% GPT-6 Luna (Medium) is 50.4% faster |
| Price per 1M tokens (in / out) | $1.50 / $9.00 | $0.10 / $0.50 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
GPT-6 Luna (Medium) vs Gemini 3.5 Flash (High): 8.3% less intelligence, 99.3% less cost to run the AA benchmark, and 50.4% faster end-to-end.
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-6 Luna (Medium) is on today's frontier: nothing is both smarter and cheaper.
Gemini 3.5 Flash (High)GPT-6 Luna (Medium)Today's Pareto frontierEvery other model
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