Claude Fable 5.1 (Medium, Default Fallback) vs Solar Pro 4
Which is better for the money: Claude Fable 5.1 (Medium, 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 Fable 5.1 (Medium, Default Fallb… scores 22.3 points higher (48.9 vs 26.6) but costs 5.4× as much to run the benchmark ($3983 vs $737; flagship vs premium cost classes). They are not alternatives at one budget: pick Claude Fable 5.1 (Medium, Default Fallb… when you need intelligence above 26.6, and Solar Pro 4 when 26.6 is enough.
| Metric | Claude Fable 5.1 (Medium, Default Fallback) | Solar Pro 4 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 48.9 | 26.6 | −45.6% Solar Pro 4 is 45.6% less intelligent |
| Total AA cost (lower is better) | $3,983.28 | $736.82 | −81.5% Solar Pro 4 is 81.5% cheaper |
| End-to-end time (lower is better) | 14.35s | 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 5.1 (Medium, Default Fallback): 45.6% less intelligence, 81.5% less cost to run the AA benchmark, and end-to-end time not fully reported.
Today's Pareto frontier
Against the frontier
- Claude Fable 5.1 (Medium, Default Fallback) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- 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 5.1 (Medium, Default Fallback)Solar Pro 4Today's Pareto frontierEvery other model
Matchup
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