Claude Fable 5 (Max, Opus 4.8 Fallback) vs Solar Pro 4
Which is better for the money: Claude Fable 5 (Max, Opus 4.8 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 Fable 5 (Max, Opus 4.8 Fallback) scores 23.0 points higher (49.6 vs 26.6) but costs 15× as much to run the benchmark ($11161 vs $737; flagship vs premium cost classes). They are not alternatives at one budget: pick Claude Fable 5 (Max, Opus 4.8 Fallback) when you need intelligence above 26.6, and Solar Pro 4 when 26.6 is enough.
| Metric | Claude Fable 5 (Max, Opus 4.8 Fallback) | Solar Pro 4 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 49.6 | 26.6 | −46.4% Solar Pro 4 is 46.4% less intelligent |
| Total AA cost (lower is better) | $11,160.86 | $736.82 | −93.4% Solar Pro 4 is 93.4% cheaper |
| End-to-end time (lower is better) | 77.70s | Not reported | — not comparable |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $0.30 / $1.20 | |
| Input modalities | Text, Image | Text |
Solar Pro 4 vs Claude Fable 5 (Max, Opus 4.8 Fallback): 46.4% less intelligence, 93.4% less cost to run the AA benchmark, and end-to-end time not fully reported.
Today's Pareto frontier
Against the frontier
- Claude Fable 5 (Max, Opus 4.8 Fallback) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Max, Default Fallback) scores 57.60 for $8708.
- Solar Pro 4 is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
Claude Fable 5 (Max, Opus 4.8 Fallback)Solar Pro 4Today's Pareto frontierEvery other model
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