Claude Sonnet 5.5 (Xhigh, Default Fallback) vs GPT-6.1 Terra (Xhigh)
Which is better for the money: Claude Sonnet 5.5 (Xhigh, Default Fallback) 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.
Depends on your budget
Claude Sonnet 5.5 (Xhigh, Default Fallb… scores 6.5 points higher (51.9 vs 45.4) but costs 6.0× as much to run the benchmark ($2177 vs $365; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Sonnet 5.5 (Xhigh, Default Fallb… when you need intelligence above 45.4, and GPT-6.1 Terra (Xhigh) when 45.4 is enough.
| Metric | Claude Sonnet 5.5 (Xhigh, Default Fallback) | GPT-6.1 Terra (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.9 | 45.4 | −12.5% GPT-6.1 Terra (Xhigh) is 12.5% less intelligent |
| Total AA cost (lower is better) | $2,176.82 | $364.95 | −83.2% GPT-6.1 Terra (Xhigh) is 83.2% cheaper |
| End-to-end time (lower is better) | 33.80s | 18.82s | −44.3% GPT-6.1 Terra (Xhigh) is 44.3% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $1.00 / $5.00 | |
| Input modalities | Text, Image | Text, Image |
GPT-6.1 Terra (Xhigh) vs Claude Sonnet 5.5 (Xhigh, Default Fallback): 12.5% less intelligence, 83.2% less cost to run the AA benchmark, and 44.3% faster end-to-end.
Against the frontier
- Claude Sonnet 5.5 (Xhigh, Default Fallback) 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.
Compare something else
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-sonnet-5-5-xhigh/gpt-6-1-terra-xhigh · Markdown: /api/v1/compare/claude-sonnet-5-5-xhigh/gpt-6-1-terra-xhigh?format=md · llms.txt · agent skill