Gemini 3.8 Flash (Medium) vs GPT-5.6 Terra (High)
Which is better for the money: Gemini 3.8 Flash (Medium) by Google or GPT-5.6 Terra (High) 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
Gemini 3.8 Flash (Medium) scores 5.6 points higher (39.8 vs 34.2) but costs 1.4× as much to run the benchmark ($1100 vs $768; both premium class). Pick Gemini 3.8 Flash (Medium) when the extra intelligence is worth the premium, otherwise GPT-5.6 Terra (High).
| Metric | Gemini 3.8 Flash (Medium) | GPT-5.6 Terra (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 39.8 | 34.2 | −14.1% GPT-5.6 Terra (High) is 14.1% less intelligent |
| Total AA cost (lower is better) | $1,100.06 | $767.78 | −30.2% GPT-5.6 Terra (High) is 30.2% cheaper |
| End-to-end time (lower is better) | Not reported | 6.57s | — not comparable |
| Price per 1M tokens (in / out) | $0.75 / $3.75 | $2.00 / $12.0 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
GPT-5.6 Terra (High) vs Gemini 3.8 Flash (Medium): 14.1% less intelligence, 30.2% less cost to run the AA benchmark, and end-to-end time not fully reported.
Today's Pareto frontier
Against the frontier
- Gemini 3.8 Flash (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- GPT-5.6 Terra (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
Gemini 3.8 Flash (Medium)GPT-5.6 Terra (High)Today's Pareto frontierEvery other model
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