Claude Opus 5 (Low) vs GPT-5.6 Terra (Medium)
Which is better for the money: Claude Opus 5 (Low) by Anthropic or GPT-5.6 Terra (Medium) 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
Claude Opus 5 (Low) scores 9.3 points higher (39.4 vs 30.1) but costs 3.5× as much to run the benchmark ($1561 vs $447; premium vs mid-range cost classes). They are not alternatives at one budget: pick Claude Opus 5 (Low) when you need intelligence above 30.1, and GPT-5.6 Terra (Medium) when 30.1 is enough.
| Metric | Claude Opus 5 (Low) | GPT-5.6 Terra (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 39.4 | 30.1 | −23.6% GPT-5.6 Terra (Medium) is 23.6% less intelligent |
| Total AA cost (lower is better) | $1,560.91 | $446.53 | −71.4% GPT-5.6 Terra (Medium) is 71.4% cheaper |
| End-to-end time (lower is better) | 11.37s | 5.84s | −48.6% GPT-5.6 Terra (Medium) is 48.6% faster |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $2.00 / $12.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Terra (Medium) vs Claude Opus 5 (Low): 23.6% less intelligence, 71.4% less cost to run the AA benchmark, and 48.6% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5 (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- 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.
Claude Opus 5 (Low)GPT-5.6 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-low/gpt-5-6-terra-medium · Markdown: /api/v1/compare/claude-opus-5-low/gpt-5-6-terra-medium?format=md · llms.txt · agent skill