Claude Opus 5.5 (Xhigh, Default Fallback) vs GPT-5.6 Terra (Non-reasoning)
Which is better for the money: Claude Opus 5.5 (Xhigh, Default Fallback) by Anthropic or GPT-5.6 Terra (Non-reasoning) 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 Opus 5.5 (Xhigh, Default Fallbac… scores 35.2 points higher (56.0 vs 20.8) but costs 16× as much to run the benchmark ($4057 vs $256; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Opus 5.5 (Xhigh, Default Fallbac… when you need intelligence above 20.8, and GPT-5.6 Terra (Non-reasoning) when 20.8 is enough.
| Metric | Claude Opus 5.5 (Xhigh, Default Fallback) | GPT-5.6 Terra (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 56.0 | 20.8 | −62.9% GPT-5.6 Terra (Non-re… is 62.9% less intelligent |
| Total AA cost (lower is better) | $4,056.65 | $255.77 | −93.7% GPT-5.6 Terra (Non-re… is 93.7% cheaper |
| End-to-end time (lower is better) | 127.76s | 4.90s | −96.2% GPT-5.6 Terra (Non-re… is 96.2% faster |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $2.00 / $12.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Terra (Non-reasoning) vs Claude Opus 5.5 (Xhigh, Default Fallback): 62.9% less intelligence, 93.7% less cost to run the AA benchmark, and 96.2% faster end-to-end.
Against the frontier
- Claude Opus 5.5 (Xhigh, Default Fallback) is on today's frontier: nothing is both smarter and cheaper.
- GPT-5.6 Terra (Non-reasoning) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
Compare something else
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-5-xhigh/gpt-5-6-terra-non-reasoning · Markdown: /api/v1/compare/claude-opus-5-5-xhigh/gpt-5-6-terra-non-reasoning?format=md · llms.txt · agent skill