GPT-5.6 Luna (Non-reasoning) vs GPT-6 Sol (Low)
Which is better for the money: GPT-5.6 Luna (Non-reasoning) by OpenAI or GPT-6 Sol (Low) by OpenAI? 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
GPT-6 Sol (Low) scores 18.7 points higher (34.2 vs 15.5) but costs 12× as much to run the benchmark ($269 vs $23.0; mid-range vs budget cost classes). They are not alternatives at one budget: pick GPT-6 Sol (Low) when you need intelligence above 15.5, and GPT-5.6 Luna (Non-reasoning) when 15.5 is enough.
| Metric | GPT-5.6 Luna (Non-reasoning) | GPT-6 Sol (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 15.5 | 34.2 | +120.6% GPT-6 Sol (Low) is 2.2× more intelligent |
| Total AA cost (lower is better) | $22.97 | $268.73 | +1069.9% GPT-6 Sol (Low) is 12× more expensive |
| End-to-end time (lower is better) | 5.06s | 6.12s | +20.9% GPT-6 Sol (Low) is 20.9% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $2.00 / $10.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Sol (Low) vs GPT-5.6 Luna (Non-reasoning): 120.6% more intelligence, 1069.9% more cost to run the AA benchmark, and 20.9% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Non-reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
- GPT-6 Sol (Low) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
GPT-5.6 Luna (Non-reasoning)GPT-6 Sol (Low)Today's Pareto frontierEvery other model
Matchup
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