GPT-6 Luna (Low) vs Muse Spark Open (Xhigh)
Which is better for the money: GPT-6 Luna (Low) by OpenAI or Muse Spark Open (Xhigh) by Meta? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
Muse Spark Open (Xhigh) scores 17.4 points higher (38.9 vs 21.5) but costs 111× as much to run the benchmark ($1185 vs $10.6; premium vs budget cost classes). They are not alternatives at one budget: pick Muse Spark Open (Xhigh) when you need intelligence above 21.5, and GPT-6 Luna (Low) when 21.5 is enough.
| Metric | GPT-6 Luna (Low) | Muse Spark Open (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 21.5 | 38.9 | +80.9% Muse Spark Open (Xhig… is 80.9% more intelligent |
| Total AA cost (lower is better) | $10.63 | $1,184.90 | +11046.8% Muse Spark Open (Xhig… is 111× more expensive |
| End-to-end time (lower is better) | 6.60s | 17.34s | +162.7% Muse Spark Open (Xhig… is 162.7% 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 (Low): 80.9% more intelligence, 11046.8% more cost to run the AA benchmark, and 162.7% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (Low) 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 (Low)Muse Spark Open (Xhigh)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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