GPT-5.6 Luna (Non-reasoning) vs Solar Pro 4
Which is better for the money: GPT-5.6 Luna (Non-reasoning) by OpenAI or Solar Pro 4 by Upstage? 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
Solar Pro 4 scores 11.1 points higher (26.6 vs 15.5) but costs 32× as much to run the benchmark ($737 vs $23.0; premium vs budget cost classes). They are not alternatives at one budget: pick Solar Pro 4 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) | Solar Pro 4 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 15.5 | 26.6 | +71.6% Solar Pro 4 is 71.6% more intelligent |
| Total AA cost (lower is better) | $22.97 | $736.82 | +3107.7% Solar Pro 4 is 32× more expensive |
| End-to-end time (lower is better) | 4.97s | Not reported | — not comparable |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $0.30 / $1.20 | |
| Input modalities | Text, Image | Text |
Solar Pro 4 vs GPT-5.6 Luna (Non-reasoning): 71.6% more intelligence, 3107.7% more cost to run the AA benchmark, and end-to-end time not fully reported.
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.
- Solar Pro 4 is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
GPT-5.6 Luna (Non-reasoning)Solar Pro 4Today's Pareto frontierEvery other model
Matchup
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