What is the difference between Claude Fable 5.1 and DeepSeek V3 (March 2024)?

Claude Fable 5.1 is developed by Anthropic while DeepSeek V3 (March 2024) is developed by DeepSeek. Claude Fable 5.1 has a 1.0M token context window vs DeepSeek V3 (March 2024)'s 128K. 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 DeepSeek V3 (March 2024)?

It depends on your use case. Claude Fable 5.1 and DeepSeek V3 (March 2024) 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 DeepSeek V3 (March 2024)?

Claude Fable 5.1 costs $10/M input tokens and DeepSeek V3 (March 2024) costs $0.14/M input tokens. DeepSeek V3 (March 2024) is $9.86/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 DeepSeek V3 (March 2024) on Rival?

This page shows a side-by-side comparison of Claude Fable 5.1 and DeepSeek V3 (March 2024) 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 Sep 2026

Claude Fable 5.1vsDeepSeek V3 (March 2024)

DeepSeek V3 (March 2024) is cheaper than Claude Fable 5.1 at $0.14/M vs $10/M input tokens.

Claude Fable 5.1 and DeepSeek V3 (March 2024) compared across 10 shared prompts
Spec	Claude Fable 5.1	DeepSeek V3 (March 2024)
Input price	$10/M tokens	$0.14/M tokens
Output price	$50/M tokens	$0.28/M tokens
Context window	1.0M tokens	128K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	No
Released	Sep 2026	Mar 2024