GPT-5.6 Terra (Medium) vs GPT-6.1 Terra (Xhigh)
Which is better for the money: GPT-5.6 Terra (Medium) by OpenAI or GPT-6.1 Terra (Xhigh) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Clear winner
Verdict
Pick GPT-6.1 Terra (Xhigh)
GPT-6.1 Terra (Xhigh) vs GPT-5.6 Terra (Medium): 50.8% more intelligence, 18.3% less cost to run the AA benchmark, and 217.4% slower end-to-end.
| Metric | GPT-5.6 Terra (Medium) | GPT-6.1 Terra (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 30.1 | 45.4 | +50.8% GPT-6.1 Terra (Xhigh) is 50.8% more intelligent |
| Total AA cost (lower is better) | $446.53 | $364.95 | −18.3% GPT-6.1 Terra (Xhigh) is 18.3% cheaper |
| End-to-end time (lower is better) | 5.93s | 18.82s | +217.4% GPT-6.1 Terra (Xhigh) is 217.4% slower |
| Price per 1M tokens (in / out) | $2.00 / $12.0 | $1.00 / $5.00 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- GPT-5.6 Terra (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Medium) scores 47.80 for $361.
- GPT-6.1 Terra (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Medium) scores 47.80 for $361.
GPT-5.6 Terra (Medium)GPT-6.1 Terra (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/gpt-5-6-terra-medium/gpt-6-1-terra-xhigh · Markdown: /api/v1/compare/gpt-5-6-terra-medium/gpt-6-1-terra-xhigh?format=md · llms.txt · agent skill