Gemini 4 Carbon (Medium) vs GPT-6 Luna (Low)
Which is better for the money: Gemini 4 Carbon (Medium) by Google or GPT-6 Luna (Low) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-11-03.
Trade-off
Verdict
Depends on your budget
Gemini 4 Carbon (Medium) scores 48.0 points higher (57.7 vs 9.7) but costs 649× as much to run the benchmark ($5903 vs $9.09; flagship vs budget cost classes). They are not alternatives at one budget: pick Gemini 4 Carbon (Medium) when you need intelligence above 9.7, and GPT-6 Luna (Low) when 9.7 is enough.
| Metric | Gemini 4 Carbon (Medium) | GPT-6 Luna (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 57.7 | 9.7 | −83.2% GPT-6 Luna (Low) is 83.2% less intelligent |
| Total AA cost (lower is better) | $5,903.03 | $9.09 | −99.8% GPT-6 Luna (Low) is 99.8% cheaper |
| End-to-end time (lower is better) | 11.62s | 7.26s | −37.5% GPT-6 Luna (Low) is 37.5% faster |
| 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 (Low) vs Gemini 4 Carbon (Medium): 83.2% less intelligence, 99.8% less cost to run the AA benchmark, and 37.5% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Gemini 4 Carbon (Medium) is on today's frontier: nothing is both smarter and cheaper.
- GPT-6 Luna (Low) is on today's frontier: nothing is both smarter and cheaper.
Gemini 4 Carbon (Medium)GPT-6 Luna (Low)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-medium/gpt-6-luna-low · Markdown: /api/v1/compare/gemini-4-carbon-medium/gpt-6-luna-low?format=md · llms.txt · agent skill