GPT-5.5 Instant (June 2026) vs Solar Pro 4
Which is better for the money: GPT-5.5 Instant (June 2026) by OpenAI or Solar Pro 4 by Upstage? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick Solar Pro 4
Solar Pro 4 vs GPT-5.5 Instant (June 2026): 2.3% more intelligence, 37.8% less cost to run the AA benchmark, and end-to-end time not fully reported.
| Metric | GPT-5.5 Instant (June 2026) | Solar Pro 4 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 26.0 | 26.6 | +2.3% Solar Pro 4 is 2.3% more intelligent |
| Total AA cost (lower is better) | $1,184.34 | $736.82 | −37.8% Solar Pro 4 is 37.8% cheaper |
| End-to-end time (lower is better) | 16.70s | Not reported | — not comparable |
| Price per 1M tokens (in / out) | $5.00 / $30.0 | $0.30 / $1.20 | |
| Input modalities | Text, Image | Text |
Today's Pareto frontier
Against the frontier
- GPT-5.5 Instant (June 2026) 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-5.5 Instant (June 2026)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-5-5-instant-06-26/solar-pro4 · Markdown: /api/v1/compare/gpt-5-5-instant-06-26/solar-pro4?format=md · llms.txt · agent skill