What is the difference between Claude Fable 5 and Claude Opus 5?

Both are developed by Anthropic but target different use cases. Claude Fable 5 has a 1.0M token context window vs Claude Opus 5's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Fable 5 or Claude Opus 5?

It depends on your use case. Claude Fable 5 and Claude Opus 5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude Fable 5 cost compared to Claude Opus 5?

Claude Fable 5 costs $10/M input tokens and Claude Opus 5 costs $5/M input tokens. Claude Opus 5 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 Fable 5 and Claude Opus 5 on Rival?

This page shows a side-by-side comparison of Claude Fable 5 and Claude Opus 5 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.

Updated Jul 2026

Claude Fable 5vsClaude Opus 5

Claude Opus 5 is cheaper than Claude Fable 5 at $5/M vs $10/M input tokens.

Claude Fable 5 and Claude Opus 5 compared across 54 shared prompts
Spec	Claude Fable 5	Claude Opus 5
Input price	$10/M tokens	$5/M tokens
Output price	$50/M tokens	$25/M tokens
Context window	1.0M tokens	1.0M tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Jun 2026	Jul 2026