GPT-5.6 Luna (Medium) vs Solar Pro 3
Which is better for the money: GPT-5.6 Luna (Medium) by OpenAI or Solar Pro 3 by Upstage? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Clear winner
Verdict
Pick GPT-5.6 Luna (Medium)
Solar Pro 3 vs GPT-5.6 Luna (Medium): 68.8% less intelligence, 259.3% more cost to run the AA benchmark, and 225.4% slower end-to-end.
| Metric | GPT-5.6 Luna (Medium) | Solar Pro 3 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 25.0 | 7.8 | −68.8% Solar Pro 3 is 68.8% less intelligent |
| Total AA cost (lower is better) | $44.32 | $159.22 | +259.3% Solar Pro 3 is 3.6× more expensive |
| End-to-end time (lower is better) | 5.82s | 18.94s | +225.4% Solar Pro 3 is 225.4% 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 (Medium) is off the frontier: at the same or lower cost, GPT-6 Luna (Medium) scores 29.90 for $31.2.
- 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 (Medium)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-medium/solar-pro-3 · Markdown: /api/v1/compare/gpt-5-6-luna-medium/solar-pro-3?format=md · llms.txt · agent skill