Claude Fable 5.1 (Low, Default Fallback) vs GPT-6 Sol (Xhigh)
Which is better for the money: Claude Fable 5.1 (Low, Default Fallback) by Anthropic or GPT-6 Sol (Xhigh) 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 (Low, Default Fallback) scores 2.6 points higher (46.8 vs 44.2) but costs 3.7× as much to run the benchmark ($3158 vs $855; flagship vs premium cost classes). They are not alternatives at one budget: pick Claude Fable 5.1 (Low, Default Fallback) when you need intelligence above 44.2, and GPT-6 Sol (Xhigh) when 44.2 is enough.
| Metric | Claude Fable 5.1 (Low, Default Fallback) | GPT-6 Sol (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 46.8 | 44.2 | −5.6% GPT-6 Sol (Xhigh) is 5.6% less intelligent |
| Total AA cost (lower is better) | $3,157.66 | $854.60 | −72.9% GPT-6 Sol (Xhigh) is 72.9% cheaper |
| End-to-end time (lower is better) | 10.92s | 41.96s | +284.2% GPT-6 Sol (Xhigh) is 284.2% slower |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Sol (Xhigh) vs Claude Fable 5.1 (Low, Default Fallback): 5.6% less intelligence, 72.9% less cost to run the AA benchmark, and 284.2% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Fable 5.1 (Low, Default Fallback) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- GPT-6 Sol (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
Claude Fable 5.1 (Low, Default Fallback)GPT-6 Sol (Xhigh)Today's Pareto frontierEvery other model
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