Gemini 4 Carbon (High) vs GPT-6 Luna (Medium)
Which is better for the money: Gemini 4 Carbon (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 2026-10-30.
Trade-off
Verdict
Depends on your budget
Gemini 4 Carbon (High) scores 41.1 points higher (59.4 vs 18.3) but costs 208× as much to run the benchmark ($8240 vs $39.5; flagship vs budget cost classes). They are not alternatives at one budget: pick Gemini 4 Carbon (High) when you need intelligence above 18.3, and GPT-6 Luna (Medium) when 18.3 is enough.
| Metric | Gemini 4 Carbon (High) | GPT-6 Luna (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 59.4 | 18.3 | −69.2% GPT-6 Luna (Medium) is 69.2% less intelligent |
| Total AA cost (lower is better) | $8,239.69 | $39.55 | −99.5% GPT-6 Luna (Medium) is 99.5% cheaper |
| End-to-end time (lower is better) | 109.02s | Not reported | — not comparable |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $0.10 / $0.50 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
GPT-6 Luna (Medium) vs Gemini 4 Carbon (High): 69.2% less intelligence, 99.5% less cost to run the AA benchmark, and end-to-end time not fully reported.
Today's Pareto frontier
Against the frontier
- Gemini 4 Carbon (High) is on today's frontier: nothing is both smarter and cheaper.
- GPT-6 Luna (Medium) is on today's frontier: nothing is both smarter and cheaper.
Gemini 4 Carbon (High)GPT-6 Luna (Medium)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/gemini-4-carbon/gpt-6-luna-medium · Markdown: /api/v1/compare/gemini-4-carbon/gpt-6-luna-medium?format=md · llms.txt · agent skill