Claude Fable 5.1 vs 
Solar Pro 4
Solar Pro 4 is cheaper than Claude Fable 5.1 at $0.09/M vs $10/M input tokens.
Pokémon Battle UI Recreation
Pokémon battle screen you can actually click. One HTML file.
Loading the build
Loading the build
Which answer wins?
Price and specs
Not enough votes to call it. On the specs, Claude Fable 5.1 has the edge: bigger model tier, bigger context window, major provider backing. Solar Pro 4 costs 139x less per token.
| Spec | Claude Fable 5.1 | Solar Pro 4 |
|---|---|---|
| Input price | $10/M tokens | $0.09/M tokens |
| Output price | $50/M tokens | $0.36/M tokens |
| Context window | 1.0M tokens | 524K tokens |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Sep 2026 | Aug 2026 |
| At 10M a month | $100 | $0.90 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Solar Pro 41 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Claude Fable 5.1 and Solar Pro 4?
Claude Fable 5.1 is developed by Anthropic while Solar Pro 4 is developed by Upstage. Claude Fable 5.1 has a 1.0M token context window vs Solar Pro 4's 524K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.
Which is better, Claude Fable 5.1 or Solar Pro 4?
It depends on your use case. Claude Fable 5.1 and Solar Pro 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.
How much does Claude Fable 5.1 cost compared to Solar Pro 4?
Claude Fable 5.1 costs $10/M input tokens and Solar Pro 4 costs $0.09/M input tokens. Solar Pro 4 is $9.91/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Claude Fable 5.1 and Solar Pro 4 on Rival?
This page shows a side-by-side comparison of Claude Fable 5.1 and Solar Pro 4 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
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Same lab, same size, long tail
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