Claude Opus 5.5 (Low, Default Fallback) vs Solar Pro 4
Which is better for the money: Claude Opus 5.5 (Low, Default Fallback) by Anthropic 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
Claude Opus 5.5 (Low, Default Fallback) scores 15.7 points higher (42.3 vs 26.6) but costs 1.2× as much to run the benchmark ($860 vs $737; both premium class). Pick Claude Opus 5.5 (Low, Default Fallback) when the extra intelligence is worth the premium, otherwise Solar Pro 4.
| Metric | Claude Opus 5.5 (Low, Default Fallback) | Solar Pro 4 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 42.3 | 26.6 | −37.1% Solar Pro 4 is 37.1% less intelligent |
| Total AA cost (lower is better) | $860.33 | $736.82 | −14.4% Solar Pro 4 is 14.4% cheaper |
| End-to-end time (lower is better) | 11.02s | 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 Claude Opus 5.5 (Low, Default Fallback): 37.1% less intelligence, 14.4% less cost to run the AA benchmark, and end-to-end time not fully reported.
Today's Pareto frontier
Against the frontier
- Claude Opus 5.5 (Low, Default Fallback) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
- Solar Pro 4 is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
Claude Opus 5.5 (Low, Default Fallback)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/claude-opus-5-5-low/solar-pro4 · Markdown: /api/v1/compare/claude-opus-5-5-low/solar-pro4?format=md · llms.txt · agent skill