GPT-6 Luna (Xhigh) vs Muse Spark Open (Xhigh)
Which is better for the money: GPT-6 Luna (Xhigh) by OpenAI or Muse Spark Open (Xhigh) by Meta? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Muse Spark Open (Xhigh) scores 4.3 points higher (38.9 vs 34.6) but costs 18× as much to run the benchmark ($1185 vs $66.8; premium vs mid-range cost classes). They are not alternatives at one budget: pick Muse Spark Open (Xhigh) when you need intelligence above 34.6, and GPT-6 Luna (Xhigh) when 34.6 is enough.
| Metric | GPT-6 Luna (Xhigh) | Muse Spark Open (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.6 | 38.9 | +12.4% Muse Spark Open (Xhig… is 12.4% more intelligent |
| Total AA cost (lower is better) | $66.81 | $1,184.90 | +1673.5% Muse Spark Open (Xhig… is 18× more expensive |
| End-to-end time (lower is better) | 23.90s | 16.45s | −31.2% Muse Spark Open (Xhig… is 31.2% faster |
| 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 (Xhigh): 12.4% more intelligence, 1673.5% more cost to run the AA benchmark, and 31.2% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (Xhigh) 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 (Xhigh)Muse Spark Open (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
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