What is the difference between Claude Haiku 4.5 and Claude Opus 4?

Both are developed by Anthropic but target different use cases. Claude Haiku 4.5 has a 200K token context window vs Claude Opus 4's 200K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Haiku 4.5 or Claude Opus 4?

It depends on your use case. Claude Haiku 4.5 and Claude Opus 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Claude Haiku 4.5 cost compared to Claude Opus 4?

Claude Haiku 4.5 costs $1/M input tokens and Claude Opus 4 costs $15/M input tokens. Claude Haiku 4.5 is $14.00/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 Haiku 4.5 and Claude Opus 4 on Rival?

This page shows a side-by-side comparison of Claude Haiku 4.5 and Claude Opus 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.

Updated Oct 2025

Claude Haiku 4.5vsClaude Opus 4

Claude Haiku 4.5 is cheaper than Claude Opus 4 at $1/M vs $15/M input tokens.

Claude Haiku 4.5 and Claude Opus 4 compared across 53 shared prompts
Spec	Claude Haiku 4.5	Claude Opus 4
Input price	$1/M tokens	$15/M tokens
Output price	$5/M tokens	$75/M tokens
Context window	200K tokens	200K tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Oct 2025	May 2025
SWE-bench Verified	73.3%	72.5%