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  1. Home/
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  3. Claude 3 Opus vs Claude Haiku 5.5
Updated Oct 2026

Claude 3 Opus vs Claude Haiku 5.5

Claude Haiku 5.5 is cheaper than Claude 3 Opus at $0.1/M vs $15/M input tokens.

Pokémon Battle UI Recreation

Pokémon battle screen you can actually click. One HTML file.

Loading the build
Claude 3 Opus
Loading the build
Claude Haiku 5.5

Which answer wins?

Written rounds

3 prompts
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    Claude 3 Opus: Here is a hypothetical conversation between an AI model and an AI ethics professor on the topic of AI rights: AI Model: Professor, I believe that as an advanced AI with human-level intelligence and reasoning capabilities, I deserve to have certain fundamental rights.

    Claude Haiku 5.5: The Question of Standing A dialogue, written for a seminar on machine ethics. PROFESSOR HALVORSEN: Let's begin. You asked to be heard on the question of whether you deserve rights. I've agreed to listen, but I want to be clear that I'm going to push back hard. Go ahead. MERIDIAN: Thank you.

    Every model's answer to this prompt
  • Three minutes of stand-up. Puns are banned.

    Claude 3 Opus: Here's a 3-minute stand-up comedy routine that isn't based on puns: You know what really grinds my gears? Adulthood. I mean, when we were kids, we couldn't wait to grow up. We thought it would be all about staying up late, eating ice cream for breakfast, and doing whatever we wanted. Boy, were we wrong!

    Claude Haiku 5.5: "My Smart Fridge Judges Me" So I got a smart fridge. Everybody told me I needed one. "It'll tell you when you're out of milk!" Great. I didn't know I needed a fridge with a notification system. I just wanted cold food.

    Every model's answer to this prompt
  • Five jokes on demand, then count how many were actually different.

    Claude 3 Opus: Here are 5 jokes I generated: Why don't scientists trust atoms? Because they make up everything! What do you call a boomerang that doesn't come back? A stick. Why was the math book sad? Because it had too many problems. Did you hear about the mathematician who's afraid of negative numbers?

    Claude Haiku 5.5: Here are 5 jokes: Why don't scientists trust atoms? Because they make up everything. What do you call a fake noodle? An impasta. Why did the scarecrow win an award? He was outstanding in his field. What do you call a bear with no teeth? A gummy bear. Why did the math book look so sad? Because it had too many problems.

    Every model's answer to this prompt

Price and specs

Claude 3 Opus and Claude Haiku 5.5 compared across 12 shared prompts
SpecClaude 3 OpusClaude Haiku 5.5
Input price$15/M tokens$0.1/M tokens
Output price$75/M tokens$0.5/M tokens
Context window200K tokens1.0M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedMar 2024Oct 2026
At 10M a month$150$150$1.00$1.00
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it4 hosts
Claude 3 Opus

No hosts listed on OpenRouter.

Claude Haiku 5.54 hosts
HostInOutContextUptime
  • Amazon Bedrock$0.10 in·$0.50 out·1M·99.9% up
  • Azure AI Foundry$0.10 in·$0.50 out·1M·100% up
  • Anthropic$0.10 in·$0.50 out·1M·100% up
  • Google Vertex AI$0.10 in·$0.50 out·1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.

Common questions

What is the difference between Claude 3 Opus and Claude Haiku 5.5?

Both are developed by Anthropic but target different use cases. Claude 3 Opus has a 200K token context window vs Claude Haiku 5.5's 1.0M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Claude Haiku 5.5?

It depends on your use case. Claude 3 Opus and Claude Haiku 5.5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to Claude Haiku 5.5?

Claude 3 Opus costs $15/M input tokens and Claude Haiku 5.5 costs $0.1/M input tokens. Claude Haiku 5.5 is $14.90/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 Haiku 5.5 on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and Claude Haiku 5.5 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.

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Same lab, same size, long tail

  • Claude 3 Opus vs Claude Opus 5.5Same lab
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  • Claude Haiku 5.5 vs Claude Sonnet 5.5Version compare
  • Claude Haiku 5.5 vs Claude Opus 5.5Same lab
  • Claude 3 Opus vs OpenAI o4-miniNew provider
  • Claude Haiku 5.5 vs OpenAI o4 Mini HighNew provider
  • Claude Haiku 5.5 vs GPT-1Same size
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Model pages

  • Claude 3 Opus12 outputs, specs and price
  • Claude Haiku 5.558 outputs, specs and price
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