Gemini 3.1 Flash-Lite vs GPT-5.6 Luna (Xhigh)
Which is better for the money: Gemini 3.1 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.
Trade-off
Verdict
Depends on your budget
GPT-5.6 Luna (Xhigh) scores 19.0 points higher (34.6 vs 15.6) but costs 1.2× as much to run the benchmark ($179 vs $156; both mid-range class). Pick GPT-5.6 Luna (Xhigh) when the extra intelligence is worth the premium, otherwise Gemini 3.1 Flash-Lite.
| Metric | Gemini 3.1 Flash-Lite | GPT-5.6 Luna (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 15.6 | 34.6 | +121.8% GPT-5.6 Luna (Xhigh) is 2.2× more intelligent |
| Total AA cost (lower is better) | $155.87 | $179.33 | +15.1% GPT-5.6 Luna (Xhigh) is 15.1% more expensive |
| End-to-end time (lower is better) | 6.10s | 40.39s | +562.1% GPT-5.6 Luna (Xhigh) is 562.1% slower |
| Price per 1M tokens (in / out) | $0.25 / $1.50 | $0.20 / $1.20 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
GPT-5.6 Luna (Xhigh) vs Gemini 3.1 Flash-Lite: 121.8% more intelligence, 15.1% more cost to run the AA benchmark, and 562.1% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Gemini 3.1 Flash-Lite is off the frontier: at the same or lower cost, GPT-6 Luna (Max) scores 38.10 for $122.
- 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 3.1 Flash-LiteGPT-5.6 Luna (Xhigh)Today's Pareto frontierEvery other model
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