Claude Fable 5.1 (Medium, Default Fallback) vs GPT-5.5 (High)
Which is better for the money: Claude Fable 5.1 (Medium, Default Fallback) by Anthropic or GPT-5.5 (High) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
Claude Fable 5.1 (Medium, Default Fallb… scores 11.9 points higher (48.9 vs 37.0) but costs 1.2× as much to run the benchmark ($3983 vs $3411; both flagship class). Pick Claude Fable 5.1 (Medium, Default Fallb… when the extra intelligence is worth the premium, otherwise GPT-5.5 (High).
| Metric | Claude Fable 5.1 (Medium, Default Fallback) | GPT-5.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 48.9 | 37.0 | −24.3% GPT-5.5 (High) is 24.3% less intelligent |
| Total AA cost (lower is better) | $3,983.28 | $3,410.76 | −14.4% GPT-5.5 (High) is 14.4% cheaper |
| End-to-end time (lower is better) | 13.16s | 19.79s | +50.4% GPT-5.5 (High) is 50.4% slower |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $5.00 / $30.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.5 (High) vs Claude Fable 5.1 (Medium, Default Fallback): 24.3% less intelligence, 14.4% less cost to run the AA benchmark, and 50.4% slower 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-5.5 (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
Claude Fable 5.1 (Medium, Default Fallback)GPT-5.5 (High)Today's Pareto frontierEvery other model
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