GPT-6 Luna (High) vs Muse Spark Open (Xhigh)
Which is better for the money: GPT-6 Luna (High) by OpenAI 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
Muse Spark Open (Xhigh) scores 6.0 points higher (38.9 vs 32.9) but costs 25× as much to run the benchmark ($1185 vs $47.9; premium vs budget cost classes). They are not alternatives at one budget: pick Muse Spark Open (Xhigh) when you need intelligence above 32.9, and GPT-6 Luna (High) when 32.9 is enough.
| Metric | GPT-6 Luna (High) | Muse Spark Open (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 32.9 | 38.9 | +18.2% Muse Spark Open (Xhig… is 18.2% more intelligent |
| Total AA cost (lower is better) | $47.85 | $1,184.90 | +2376.3% Muse Spark Open (Xhig… is 25× more expensive |
| End-to-end time (lower is better) | 14.68s | 16.47s | +12.2% Muse Spark Open (Xhig… is 12.2% slower |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $1.25 / $4.25 | |
| Input modalities | Text, Image | Text, Image, Speech, Video |
Muse Spark Open (Xhigh) vs GPT-6 Luna (High): 18.2% more intelligence, 2376.3% more cost to run the AA benchmark, and 12.2% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (High) 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.
GPT-6 Luna (High)Muse Spark Open (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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