Gemini 3.5 Flash-Lite vs GPT-5.6 Luna (Xhigh)
Which is better for the money: Gemini 3.5 Flash-Lite 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-Lite: 55.9% more intelligence, 46.8% less cost to run the AA benchmark, and 382.1% slower end-to-end.
| Metric | Gemini 3.5 Flash-Lite | GPT-5.6 Luna (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 22.2 | 34.6 | +55.9% GPT-5.6 Luna (Xhigh) is 55.9% more intelligent |
| Total AA cost (lower is better) | $337.15 | $179.33 | −46.8% GPT-5.6 Luna (Xhigh) is 46.8% cheaper |
| End-to-end time (lower is better) | 9.50s | 45.80s | +382.1% GPT-5.6 Luna (Xhigh) is 382.1% slower |
| Price per 1M tokens (in / out) | $0.30 / $2.50 | $0.20 / $1.20 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
Today's Pareto frontier
Against the frontier
- Gemini 3.5 Flash-Lite is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
- GPT-5.6 Luna (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Terra (Medium) scores 41.30 for $175.
Gemini 3.5 Flash-LiteGPT-5.6 Luna (Xhigh)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-3-5-flash-lite/gpt-5-6-luna-xhigh · Markdown: /api/v1/compare/gemini-3-5-flash-lite/gpt-5-6-luna-xhigh?format=md · llms.txt · agent skill