Claude Opus 5.5 (High, Default Fallback) vs GPT-6.1 Terra (Non-reasoning)
Which is better for the money: Claude Opus 5.5 (High, Default Fallback) by Anthropic or GPT-6.1 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 (High, Default Fallback) scores 20.1 points higher (53.6 vs 33.5) but costs 14× as much to run the benchmark ($2172 vs $154; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Opus 5.5 (High, Default Fallback) when you need intelligence above 33.5, and GPT-6.1 Terra (Non-reasoning) when 33.5 is enough.
| Metric | Claude Opus 5.5 (High, Default Fallback) | GPT-6.1 Terra (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 53.6 | 33.5 | −37.5% GPT-6.1 Terra (Non-re… is 37.5% less intelligent |
| Total AA cost (lower is better) | $2,172.43 | $153.58 | −92.9% GPT-6.1 Terra (Non-re… is 92.9% cheaper |
| End-to-end time (lower is better) | 40.35s | 6.51s | −83.9% GPT-6.1 Terra (Non-re… is 83.9% faster |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $1.00 / $5.00 | |
| Input modalities | Text, Image | Text, Image |
GPT-6.1 Terra (Non-reasoning) vs Claude Opus 5.5 (High, Default Fallback): 37.5% less intelligence, 92.9% less cost to run the AA benchmark, and 83.9% faster end-to-end.
Against the frontier
- Claude Opus 5.5 (High, Default Fallback) is on today's frontier: nothing is both smarter and cheaper.
- GPT-6.1 Terra (Non-reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Max) scores 38.10 for $122.
Compare something else
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-5-high/gpt-6-1-terra-non-reasoning · Markdown: /api/v1/compare/claude-opus-5-5-high/gpt-6-1-terra-non-reasoning?format=md · llms.txt · agent skill