Claude Opus 5 (High) vs GPT-6.1 Terra (Medium)
Which is better for the money: Claude Opus 5 (High) by Anthropic or GPT-6.1 Terra (Medium) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Trade-off
Verdict
Depends on your budget
Claude Opus 5 (High) scores 6.8 points higher (48.1 vs 41.3) but costs 25× as much to run the benchmark ($4332 vs $175; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Opus 5 (High) when you need intelligence above 41.3, and GPT-6.1 Terra (Medium) when 41.3 is enough.
| Metric | Claude Opus 5 (High) | GPT-6.1 Terra (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 48.1 | 41.3 | −14.1% GPT-6.1 Terra (Medium) is 14.1% less intelligent |
| Total AA cost (lower is better) | $4,331.68 | $175.20 | −96.0% GPT-6.1 Terra (Medium) is 96.0% cheaper |
| End-to-end time (lower is better) | 26.41s | 7.35s | −72.2% GPT-6.1 Terra (Medium) is 72.2% faster |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $1.00 / $5.00 | |
| Input modalities | Text, Image | Text, Image |
GPT-6.1 Terra (Medium) vs Claude Opus 5 (High): 14.1% less intelligence, 96.0% less cost to run the AA benchmark, and 72.2% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5 (High) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
- GPT-6.1 Terra (Medium) is on today's frontier: nothing is both smarter and cheaper.
Claude Opus 5 (High)GPT-6.1 Terra (Medium)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/claude-opus-5-high/gpt-6-1-terra-medium · Markdown: /api/v1/compare/claude-opus-5-high/gpt-6-1-terra-medium?format=md · llms.txt · agent skill