GPT-5.6 Luna (Low) vs Solar Pro 3
Which is better for the money: GPT-5.6 Luna (Low) by OpenAI or Solar Pro 3 by Upstage? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick GPT-5.6 Luna (Low)
Solar Pro 3 vs GPT-5.6 Luna (Low): 62.9% less intelligence, 489.3% more cost to run the AA benchmark, and 211.2% slower end-to-end.
| Metric | GPT-5.6 Luna (Low) | Solar Pro 3 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 21.0 | 7.8 | −62.9% Solar Pro 3 is 62.9% less intelligent |
| Total AA cost (lower is better) | $27.02 | $159.22 | +489.3% Solar Pro 3 is 5.9× more expensive |
| End-to-end time (lower is better) | 5.90s | 18.36s | +211.2% Solar Pro 3 is 211.2% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $0.15 / $0.60 | |
| Input modalities | Text, Image | Text |
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Low) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
- Solar Pro 3 is off the frontier: at the same or lower cost, Claude Haiku 5.5 (Xhigh) scores 41.20 for $158.
GPT-5.6 Luna (Low)Solar Pro 3Today's Pareto frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-6-luna-low/solar-pro-3 · Markdown: /api/v1/compare/gpt-5-6-luna-low/solar-pro-3?format=md · llms.txt · agent skill