Claude Opus 5 (Medium) vs GPT-6.1 Terra (Xhigh)
Which is better for the money: Claude Opus 5 (Medium) by Anthropic 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 Claude Opus 5 (Medium): 1.3% more intelligence, 86.6% less cost to run the AA benchmark, and 41.3% slower end-to-end.
| Metric | Claude Opus 5 (Medium) | GPT-6.1 Terra (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 44.8 | 45.4 | +1.3% GPT-6.1 Terra (Xhigh) is 1.3% more intelligent |
| Total AA cost (lower is better) | $2,731.91 | $364.95 | −86.6% GPT-6.1 Terra (Xhigh) is 86.6% cheaper |
| End-to-end time (lower is better) | 13.32s | 18.82s | +41.3% GPT-6.1 Terra (Xhigh) is 41.3% slower |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $1.00 / $5.00 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- Claude Opus 5 (Medium) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
- 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.
Claude Opus 5 (Medium)GPT-6.1 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/claude-opus-5-medium/gpt-6-1-terra-xhigh · Markdown: /api/v1/compare/claude-opus-5-medium/gpt-6-1-terra-xhigh?format=md · llms.txt · agent skill