Claude Fable 5.1 (High, Default Fallback) vs GPT-6.1 Terra (Medium)
Which is better for the money: Claude Fable 5.1 (High, Default Fallback) by Anthropic or GPT-6.1 Terra (Medium) 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 Fable 5.1 (High, Default Fallbac… scores 9.9 points higher (51.2 vs 41.3) but costs 30× as much to run the benchmark ($5242 vs $175; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Fable 5.1 (High, Default Fallbac… when you need intelligence above 41.3, and GPT-6.1 Terra (Medium) when 41.3 is enough.
| Metric | Claude Fable 5.1 (High, Default Fallback) | GPT-6.1 Terra (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.2 | 41.3 | −19.3% GPT-6.1 Terra (Medium) is 19.3% less intelligent |
| Total AA cost (lower is better) | $5,241.59 | $175.20 | −96.7% GPT-6.1 Terra (Medium) is 96.7% cheaper |
| End-to-end time (lower is better) | 25.39s | 6.95s | −72.6% GPT-6.1 Terra (Medium) is 72.6% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $1.00 / $5.00 | |
| Input modalities | Text, Image | Text, Image |
GPT-6.1 Terra (Medium) vs Claude Fable 5.1 (High, Default Fallback): 19.3% less intelligence, 96.7% less cost to run the AA benchmark, and 72.6% faster end-to-end.
Against the frontier
- Claude Fable 5.1 (High, Default Fallback) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
- GPT-6.1 Terra (Medium) is on today's frontier: nothing is both smarter and cheaper.
Compare something else
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-fable-5-1-high/gpt-6-1-terra-medium · Markdown: /api/v1/compare/claude-fable-5-1-high/gpt-6-1-terra-medium?format=md · llms.txt · agent skill