Claude Fable 5.1 (Xhigh, Default Fallback) vs GPT-5.6 Sol (Medium)
Which is better for the money: Claude Fable 5.1 (Xhigh, Default Fallback) by Anthropic or GPT-5.6 Sol (Medium) 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 (Xhigh, Default Fallba… scores 14.0 points higher (53.2 vs 39.2) but costs 9.1× as much to run the benchmark ($9063 vs $997; flagship vs premium cost classes). They are not alternatives at one budget: pick Claude Fable 5.1 (Xhigh, Default Fallba… when you need intelligence above 39.2, and GPT-5.6 Sol (Medium) when 39.2 is enough.
| Metric | Claude Fable 5.1 (Xhigh, Default Fallback) | GPT-5.6 Sol (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 53.2 | 39.2 | −26.3% GPT-5.6 Sol (Medium) is 26.3% less intelligent |
| Total AA cost (lower is better) | $9,063.11 | $997.39 | −89.0% GPT-5.6 Sol (Medium) is 89.0% cheaper |
| End-to-end time (lower is better) | 108.69s | 11.36s | −89.5% GPT-5.6 Sol (Medium) is 89.5% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $4.00 / $20.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.6 Sol (Medium) vs Claude Fable 5.1 (Xhigh, Default Fallback): 26.3% less intelligence, 89.0% less cost to run the AA benchmark, and 89.5% faster end-to-end.
Against the frontier
- Claude Fable 5.1 (Xhigh, Default Fallback) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Max, Default Fallback) scores 57.60 for $8708.
- GPT-5.6 Sol (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
Compare something else
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-fable-5-1-xhigh/gpt-5-6-sol-medium · Markdown: /api/v1/compare/claude-fable-5-1-xhigh/gpt-5-6-sol-medium?format=md · llms.txt · agent skill