Claude Opus 5.5 (High, Default Fallback) vs Muse Spark Open (Xhigh)
Which is better for the money: Claude Opus 5.5 (High, 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 2026-10-25.
Trade-off
Verdict
Depends on your budget
Claude Opus 5.5 (High, Default Fallback) scores 14.7 points higher (53.6 vs 38.9) but costs 1.8× as much to run the benchmark ($2172 vs $1185; flagship vs premium cost classes). Pick Claude Opus 5.5 (High, Default Fallback) when the extra intelligence is worth the premium, otherwise Muse Spark Open (Xhigh).
| Metric | Claude Opus 5.5 (High, Default Fallback) | Muse Spark Open (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 53.6 | 38.9 | −27.4% Muse Spark Open (Xhig… is 27.4% less intelligent |
| Total AA cost (lower is better) | $2,172.43 | $1,184.90 | −45.5% Muse Spark Open (Xhig… is 45.5% cheaper |
| End-to-end time (lower is better) | 36.54s | 17.05s | −53.3% Muse Spark Open (Xhig… is 53.3% faster |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $1.25 / $4.25 | |
| Input modalities | Text, Image | Text, Image, Speech, Video |
Muse Spark Open (Xhigh) vs Claude Opus 5.5 (High, Default Fallback): 27.4% less intelligence, 45.5% less cost to run the AA benchmark, and 53.3% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5.5 (High, Default Fallback) is on today's frontier: nothing is both smarter and cheaper.
- 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 Opus 5.5 (High, Default Fallback)Muse Spark Open (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
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