What is the difference between Claude Fable 5 and Sonoma Dusk Alpha?

Claude Fable 5 is developed by Anthropic while Sonoma Dusk Alpha is developed by OpenRouter. Claude Fable 5 has a 1.0M token context window vs Sonoma Dusk Alpha's 2.0M. You can compare their actual outputs across 34 challenges on Rival to see how they differ in practice.

Which is better, Claude Fable 5 or Sonoma Dusk Alpha?

It depends on your use case. Claude Fable 5 and Sonoma Dusk Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 34 challenges so you can judge which fits your needs best.

How much does Claude Fable 5 cost compared to Sonoma Dusk Alpha?

Claude Fable 5 costs $10/M input tokens and Sonoma Dusk Alpha costs $0/M input tokens. Sonoma Dusk Alpha is $10.00/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 Sonoma Dusk Alpha on Rival?

This page shows a side-by-side comparison of Claude Fable 5 and Sonoma Dusk Alpha 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 Jun 2026

Claude Fable 5vsSonoma Dusk Alpha

Sonoma Dusk Alpha is cheaper than Claude Fable 5 at $0/M vs $10/M input tokens.

Claude Fable 5 and Sonoma Dusk Alpha compared across 34 shared prompts
Spec	Claude Fable 5	Sonoma Dusk Alpha
Input price	$10/M tokens	Free
Output price	$50/M tokens	Free
Context window	1.0M tokens	2.0M tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Jun 2026	Sep 2025