Claude Sonnet 5.5 (Medium, Default Fallback) vs GPT-6.1 Terra (Non-reasoning)
Which is better for the money: Claude Sonnet 5.5 (Medium, 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 Sonnet 5.5 (Medium, Default Fall… scores 7.3 points higher (40.8 vs 33.5) but costs 4.1× as much to run the benchmark ($622 vs $154; premium vs mid-range cost classes). They are not alternatives at one budget: pick Claude Sonnet 5.5 (Medium, Default Fall… when you need intelligence above 33.5, and GPT-6.1 Terra (Non-reasoning) when 33.5 is enough.
| Metric | Claude Sonnet 5.5 (Medium, Default Fallback) | GPT-6.1 Terra (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 40.8 | 33.5 | −17.9% GPT-6.1 Terra (Non-re… is 17.9% less intelligent |
| Total AA cost (lower is better) | $622.28 | $153.58 | −75.3% GPT-6.1 Terra (Non-re… is 75.3% cheaper |
| End-to-end time (lower is better) | 7.65s | 6.61s | −13.6% GPT-6.1 Terra (Non-re… is 13.6% 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 (Non-reasoning) vs Claude Sonnet 5.5 (Medium, Default Fallback): 17.9% less intelligence, 75.3% less cost to run the AA benchmark, and 13.6% faster end-to-end.
Against the frontier
- Claude Sonnet 5.5 (Medium, Default Fallback) is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
- 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-sonnet-5-5-medium/gpt-6-1-terra-non-reasoning · Markdown: /api/v1/compare/claude-sonnet-5-5-medium/gpt-6-1-terra-non-reasoning?format=md · llms.txt · agent skill