Claude Fable 5.1 (Low, Default Fallback) vs Muse Spark Open (Xhigh)
Which is better for the money: Claude Fable 5.1 (Low, Default Fallback) by Anthropic or Muse Spark Open (Xhigh) by Meta? 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 7.9 points higher (46.8 vs 38.9) but costs 2.7× as much to run the benchmark ($3158 vs $1185; flagship vs premium cost classes). Pick Claude Fable 5.1 (Low, Default Fallback) when the extra intelligence is worth the premium, otherwise Muse Spark Open (Xhigh).
| Metric | Claude Fable 5.1 (Low, Default Fallback) | Muse Spark Open (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 46.8 | 38.9 | −16.9% Muse Spark Open (Xhig… is 16.9% less intelligent |
| Total AA cost (lower is better) | $3,157.66 | $1,184.90 | −62.5% Muse Spark Open (Xhig… is 62.5% cheaper |
| End-to-end time (lower is better) | 10.60s | 16.45s | +55.2% Muse Spark Open (Xhig… is 55.2% slower |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $1.25 / $4.25 | |
| Input modalities | Text, Image | Text, Image, Speech, Video |
Muse Spark Open (Xhigh) vs Claude Fable 5.1 (Low, Default Fallback): 16.9% less intelligence, 62.5% less cost to run the AA benchmark, and 55.2% 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.
- Muse Spark Open (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
Claude Fable 5.1 (Low, Default Fallback)Muse Spark Open (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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