Claude 3 Opus vs Claude Fable 5.1
Claude Fable 5.1 is cheaper than Claude 3 Opus at $10/M vs $15/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: newer, bigger context window.
| Spec | Claude 3 Opus | Claude Fable 5.1 |
|---|---|---|
| Input price | $15/M tokens | $10/M tokens |
| Output price | $75/M tokens | $50/M tokens |
| Context window | 200K tokens | 1.0M tokens |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | Mar 2024 | Sep 2026 |
| At 10M a month | $150 | $100 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Claude 3 Opus
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 12 Oct 2026.
Common questions
What is the difference between Claude 3 Opus and Claude Fable 5.1?
Both are developed by Anthropic but target different use cases. Claude 3 Opus has a 200K token context window vs Claude Fable 5.1's 1.0M. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.
Which is better, Claude 3 Opus or Claude Fable 5.1?
It depends on your use case. Claude 3 Opus and Claude Fable 5.1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.
How much does Claude 3 Opus cost compared to Claude Fable 5.1?
Claude 3 Opus costs $15/M input tokens and Claude Fable 5.1 costs $10/M input tokens. Claude Fable 5.1 is $5.00/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 3 Opus and Claude Fable 5.1 on Rival?
This page shows a side-by-side comparison of Claude 3 Opus and Claude Fable 5.1 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.
More comparisons
Against the newest arrivals
- Claude 3 Opus vs Muse WonderLanded Oct 2026
- Claude Fable 5.1 vs GPT-4 TurboLanded Oct 2026
- Claude 3 Opus vs Step 5 PreviewLanded Oct 2026
- Claude Fable 5.1 vs Claude Haiku 5.5Landed Oct 2026
- Claude 3 Opus vs Ling 3.1 FlashLanded Oct 2026
- Claude Fable 5.1 vs Mistral Large 4Landed Oct 2026
- Claude 3 Opus vs GPT-6.1 SolLanded Sep 2026
- Claude Fable 5.1 vs Claude Sonnet 5.5Landed Sep 2026
Same lab, same size, long tail
- Claude 3 Opus vs Claude Haiku 5.5Version compare
- Claude 3 Opus vs Claude Sonnet 5.5Version compare
- Claude Fable 5.1 vs Claude Opus 5.5Same lab
- Claude Fable 5.1 vs Claude Opus 5Same lab
- Claude 3 Opus vs Qwen3 CoderSame size
- Claude Fable 5.1 vs Qwen3 Coder FlashNew provider
- Claude Fable 5.1 vs Qwen3 Coder NextNew provider
- Claude Fable 5.1 vs Qwen3 Coder PlusNew provider
