Claude Fable 5.1 (Low, Default Fallback) vs LongCat 2.0
Which is better for the money: Claude Fable 5.1 (Low, Default Fallback) by Anthropic or LongCat 2.0 by LongCat? 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 27.7 points higher (46.8 vs 19.1) but costs 5.8× as much to run the benchmark ($3158 vs $545; 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 19.1, and LongCat 2.0 when 19.1 is enough.
| Metric | Claude Fable 5.1 (Low, Default Fallback) | LongCat 2.0 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 46.8 | 19.1 | −59.2% LongCat 2.0 is 59.2% less intelligent |
| Total AA cost (lower is better) | $3,157.66 | $544.74 | −82.7% LongCat 2.0 is 82.7% cheaper |
| End-to-end time (lower is better) | 10.60s | 37.44s | +253.2% LongCat 2.0 is 253.2% slower |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $0.75 / $2.95 | |
| Input modalities | Text, Image | Text |
LongCat 2.0 vs Claude Fable 5.1 (Low, Default Fallback): 59.2% less intelligence, 82.7% less cost to run the AA benchmark, and 253.2% 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.
- LongCat 2.0 is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
Claude Fable 5.1 (Low, Default Fallback)LongCat 2.0Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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