Claude Fable 5.1 (Medium, Default Fallback) vs GPT-5.6 Sol (Low)
Which is better for the money: Claude Fable 5.1 (Medium, Default Fallback) by Anthropic or GPT-5.6 Sol (Low) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Claude Fable 5.1 (Medium, Default Fallb… scores 15.4 points higher (48.9 vs 33.5) but costs 6.3× as much to run the benchmark ($3983 vs $637; flagship vs premium cost classes). They are not alternatives at one budget: pick Claude Fable 5.1 (Medium, Default Fallb… when you need intelligence above 33.5, and GPT-5.6 Sol (Low) when 33.5 is enough.
| Metric | Claude Fable 5.1 (Medium, Default Fallback) | GPT-5.6 Sol (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 48.9 | 33.5 | −31.5% GPT-5.6 Sol (Low) is 31.5% less intelligent |
| Total AA cost (lower is better) | $3,983.28 | $637.28 | −84.0% GPT-5.6 Sol (Low) is 84.0% cheaper |
| End-to-end time (lower is better) | 18.10s | 8.26s | −54.4% GPT-5.6 Sol (Low) is 54.4% 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 (Low) vs Claude Fable 5.1 (Medium, Default Fallback): 31.5% less intelligence, 84.0% less cost to run the AA benchmark, and 54.4% faster end-to-end.
Today's Pareto frontier
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-5.6 Sol (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
Claude Fable 5.1 (Medium, Default Fallback)GPT-5.6 Sol (Low)Today's Pareto frontierEvery other model
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