Gemini 3.8 Flash (Medium) vs GPT-5.6 Terra (Xhigh)
Which is better for the money: Gemini 3.8 Flash (Medium) by Google or GPT-5.6 Terra (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 Gemini 3.8 Flash (Medium)
GPT-5.6 Terra (Xhigh) vs Gemini 3.8 Flash (Medium): 4.5% less intelligence, 7.9% more cost to run the AA benchmark, and end-to-end time not fully reported.
| Metric | Gemini 3.8 Flash (Medium) | GPT-5.6 Terra (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 39.8 | 38.0 | −4.5% GPT-5.6 Terra (Xhigh) is 4.5% less intelligent |
| Total AA cost (lower is better) | $1,100.06 | $1,186.77 | +7.9% GPT-5.6 Terra (Xhigh) is 7.9% more expensive |
| End-to-end time (lower is better) | Not reported | 28.74s | — not comparable |
| Price per 1M tokens (in / out) | $0.75 / $3.75 | $2.00 / $12.0 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
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 (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
Gemini 3.8 Flash (Medium)GPT-5.6 Terra (Xhigh)Today's Pareto frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gemini-3-8-flash-medium/gpt-5-6-terra-xhigh · Markdown: /api/v1/compare/gemini-3-8-flash-medium/gpt-5-6-terra-xhigh?format=md · llms.txt · agent skill