Claude Fable 5.1 (Medium, Default Fallback) vs gpt-oss-120b (High)
Which is better for the money: Claude Fable 5.1 (Medium, Default Fallback) by Anthropic or gpt-oss-120b (High) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Depends on your budget
Claude Fable 5.1 (Medium, Default Fallb… scores 37.3 points higher (48.9 vs 11.6) but costs 32× as much to run the benchmark ($3983 vs $123; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Fable 5.1 (Medium, Default Fallb… when you need intelligence above 11.6, and gpt-oss-120b (High) when 11.6 is enough.
| Metric | Claude Fable 5.1 (Medium, Default Fallback) | gpt-oss-120b (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 48.9 | 11.6 | −76.3% gpt-oss-120b (High) is 76.3% less intelligent |
| Total AA cost (lower is better) | $3,983.28 | $122.71 | −96.9% gpt-oss-120b (High) is 96.9% cheaper |
| End-to-end time (lower is better) | 16.07s | 11.29s | −29.7% gpt-oss-120b (High) is 29.7% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $0.15 / $0.60 | |
| Input modalities | Text, Image | Text |
gpt-oss-120b (High) vs Claude Fable 5.1 (Medium, Default Fallback): 76.3% less intelligence, 96.9% less cost to run the AA benchmark, and 29.7% faster end-to-end.
Against the frontier
- Claude Fable 5.1 (Medium, Default Fallback) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- gpt-oss-120b (High) 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-fable-5-1-medium/gpt-oss-120b · Markdown: /api/v1/compare/claude-fable-5-1-medium/gpt-oss-120b?format=md · llms.txt · agent skill