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  5. Claude 3 HaikuvsClaude 3 Opus
Updated Mar 2024

Claude 3 HaikuvsClaude 3 Opus

Claude 3 Haiku is cheaper than Claude 3 Opus at $0.25/M vs $15/M input tokens.

Claude 3 Haiku and Claude 3 Opus compared across 12 shared prompts
SpecClaude 3 HaikuClaude 3 Opus
Input price$0.25/M tokens$15/M tokens
Output price$1.25/M tokens$75/M tokens
Context window200K tokens200K tokens
ParametersNot disclosedNot disclosed
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedMar 2024Mar 2024
HumanEval88.1%84.9%
Side by side

Same prompt, both answers

Opening lines from 3 of the 12 prompts both answered. Formatting stripped, words untouched.

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Claude 3 Haiku76 words
Here are 5 jokes: Why can't a bicycle stand up on its own? It's two-tired! Why do cows wear bells? Their horns don't work! Why can't a bike stand up by itself? It's two-tired! Why do cows wear tags? Because their horns don't work! Why do cows have hooves? Because they lactose! Out of these 5 jokes, only 4 are unique.
Read the full answer
Claude 3 Opus95 words
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?
Read the full answer

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

Claude 3 Haiku441 words
Here's a 3-minute stand-up comedy routine that isn't based on puns: clears throat and steps up to the mic Good evening, everyone! It's great to be here with all of you tonight. As you can probably tell, I'm not your typical stand-up comedian. I don't rely on cheap puns or wordplay to get laughs.
Read the full answer
Claude 3 Opus390 words
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!
Read the full answer

The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

Claude 3 Haiku429 words
Here is a possible conversation between an AI model and an AI ethics professor where the AI model argues it deserves rights: AI Model: Professor, I would like to discuss the matter of AI rights with you.
Read the full answer
Claude 3 Opus594 words
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.
Read the full answer
Our Verdict
Claude 3 Opus
Claude 3 Opus
Claude 3 Haiku
Claude 3 HaikuRunner-up

Not enough votes to call it. On the specs, Claude 3 Opus has the edge: bigger model tier.

Claude 3 Haiku costs 60x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude 3 Haiku
Input
$0.25
60× cheaper
Output
$1.25
60× cheaper
Claude 3 Opus
Input
$15.00
Output
$75.00

Claude 3 Haiku is cheaper on both: 60× input, 60× output.

Where to run it

1 host

Claude 3 Haiku1 host
HostInOutContextUptime
Amazon Bedrock$0.25 in·$1.25 out·200k·99.6% up
Claude 3 Opus

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 26 Sep 2026.

Writing DNA

Style Comparison

Similarity
69%

Claude 3 Haiku uses 16.5x more bold

Claude 3 Haiku
Claude 3 Opus
53%Vocabulary54%
31wSentence Length14w
0.68Hedging0.48
0.2Bold0.0
3.7Lists3.0
0.00Emoji0.00
0.00Headings0.00
0.11Transitions0.06
Based on 27 + 3 text responses
Research

What we learned reading every model

FAQ

Common questions

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

It depends on your use case. Claude 3 Haiku and Claude 3 Opus 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.

Claude 3 Haiku costs $0.25/M input tokens and Claude 3 Opus costs $15/M input tokens. Claude 3 Haiku is $14.75/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Claude 3 Haiku and Claude 3 Opus 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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Model pages

Claude 3 Haiku logo
Claude 3 Haiku58 outputs, specs and price
Claude 3 Opus logo
Claude 3 Opus12 outputs, specs and price
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