GPT-5.6 Sol (Xhigh) vs Solar Pro 4
Which is better for the money: GPT-5.6 Sol (Xhigh) 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
GPT-5.6 Sol (Xhigh) scores 17.4 points higher (44.0 vs 26.6) but costs 2.8× as much to run the benchmark ($2082 vs $737; flagship vs premium cost classes). Pick GPT-5.6 Sol (Xhigh) when the extra intelligence is worth the premium, otherwise Solar Pro 4.
| Metric | GPT-5.6 Sol (Xhigh) | Solar Pro 4 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 44.0 | 26.6 | −39.5% Solar Pro 4 is 39.5% less intelligent |
| Total AA cost (lower is better) | $2,082.28 | $736.82 | −64.6% Solar Pro 4 is 64.6% cheaper |
| End-to-end time (lower is better) | 37.17s | Not reported | — not comparable |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $0.30 / $1.20 | |
| Input modalities | Text, Image | Text |
Solar Pro 4 vs GPT-5.6 Sol (Xhigh): 39.5% less intelligence, 64.6% less cost to run the AA benchmark, and end-to-end time not fully reported.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Sol (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- 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 Sol (Xhigh)Solar Pro 4Today'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-sol-xhigh/solar-pro4 · Markdown: /api/v1/compare/gpt-5-6-sol-xhigh/solar-pro4?format=md · llms.txt · agent skill