Claude Sonnet 5 (Medium) vs GPT-5.6 Terra (Xhigh)
Which is better for the money: Claude Sonnet 5 (Medium) by Anthropic 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 GPT-5.6 Terra (Xhigh)
GPT-5.6 Terra (Xhigh) vs Claude Sonnet 5 (Medium): 35.2% more intelligence, 2.6% less cost to run the AA benchmark, and 291.1% slower end-to-end.
| Metric | Claude Sonnet 5 (Medium) | GPT-5.6 Terra (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 28.1 | 38.0 | +35.2% GPT-5.6 Terra (Xhigh) is 35.2% more intelligent |
| Total AA cost (lower is better) | $1,218.17 | $1,186.77 | −2.6% GPT-5.6 Terra (Xhigh) is 2.6% cheaper |
| End-to-end time (lower is better) | 9.30s | 36.37s | +291.1% GPT-5.6 Terra (Xhigh) is 291.1% slower |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $2.00 / $12.0 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5 (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.
Claude Sonnet 5 (Medium)GPT-5.6 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/claude-sonnet-5-medium/gpt-5-6-terra-xhigh · Markdown: /api/v1/compare/claude-sonnet-5-medium/gpt-5-6-terra-xhigh?format=md · llms.txt · agent skill