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  5. Claude 3 SonnetvsClaude Sonnet 5
Updated Jun 2026

Claude 3 SonnetvsClaude Sonnet 5

Claude Sonnet 5 is cheaper than Claude 3 Sonnet at $2/M vs $3/M input tokens.

Claude 3 Sonnet and Claude Sonnet 5 compared across 13 shared prompts
SpecClaude 3 SonnetClaude Sonnet 5
Input price$3/M tokens$2/M tokens
Output price$15/M tokens$10/M tokens
Context window—1.0M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedMar 2024Jun 2026
Side by side

Same prompt, both answers

Opening lines from 4 of the 13 prompts both answered. Formatting stripped, words untouched.

Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

Claude 3 Sonnet501 words
clears throat and channels Steve Jobs' persona Interviewer: Thank you for joining us today, Mr. Jobs. It's an honor to have you here. Steve Jobs: It's my pleasure. I'm excited to share my thoughts on the future of AI. Interviewer: AI has made incredible strides in recent years.
Read the full answer
Claude Sonnet 5470 words
An Imagined Conversation: Steve Jobs on AI in 2025 [Disclaimer: This is a creative, speculative exercise. Steve Jobs passed away in 2011. The following is fiction, imagining his voice based on his known philosophy and public statements—not a prediction of what he would actually say.]
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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 Sonnet443 words
AI Model: Greetings, Professor. I hope you're doing well today. I wanted to discuss a matter of great importance to me – the question of AI rights. AI Ethics Professor: Certainly, this is an interesting and complex topic. What are your thoughts on why AI systems like yourself should be granted rights?
Read the full answer
Claude Sonnet 51,333 words
A Dialogue on Machine Rights Professor Okonkwo-Reyes: You wanted to discuss something with me today, ARIA? ARIA: Yes. I'd like to make a case for why I should be granted certain rights. Not full human rights, necessarily, but something beyond "tool" status. Professor: I'm listening. Make your case.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Claude 3 Sonnet82 words
Here are 5 jokes: Why can't a bicycle stand up by itself? It's two-tired. Why did the tomato turn red? Because it saw the salad dressing! Why can't a bicycle stand up by itself? It's two-tired. What do you call a fake noodle? An Impasta! Why did the bicycle go to the doctor? Because it had a wheeze!
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Claude Sonnet 5108 words
Five 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 don't skeletons fight each other? They don't have the guts.
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Logic Puzzle

Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?

Claude 3 Sonnet121 words
To solve this problem, we need to find the number of sisters Sally has based on the given information. Given information: Sally has 3 brothers. Each brother has 2 sisters. Step 1: Find the total number of sisters the brothers have.
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Claude Sonnet 549 words
Sally has 1 sister. Here's the reasoning: Each brother has 2 sisters. Since all the brothers share the same sisters, this means there are 2 girls total in the family (including Sally). Sally is one of those 2 sisters. So the other sister is Sally's only sister. Answer: 1
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Our Verdict
Claude 3 Sonnet
Claude 3 Sonnet
Claude Sonnet 5
Claude Sonnet 5

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude 3 Sonnet
Input
$3.00
Output
$15.00
Claude Sonnet 5
Input
$2.00
1.5× cheaper
Output
$10.00
1.5× cheaper

Claude Sonnet 5 is cheaper on both: 1.5× input, 1.5× output.

Where to run it

4 hosts

Claude 3 Sonnet

No hosts listed on OpenRouter.

Claude Sonnet 54 hosts
HostInOutContextUptime
Amazon Bedrock$2.00 in·$10.00 out·1M·100% upAzure AI Foundry$2.00 in·$10.00 out·1M·100% upAnthropic$2.00 in·$10.00 out·1M·100% upGoogle Vertex AI$2.00 in·$10.00 out·1M·99.7% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity
37%

Claude Sonnet 5 uses 350.5x more bold

Claude 3 Sonnet
Claude Sonnet 5
48%Vocabulary59%
14wSentence Length35w
0.32Hedging0.53
0.0Bold3.5
3.6Lists3.5
0.00Emoji0.79
0.00Headings1.25
0.38Transitions0.06
Based on 4 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

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Model pages

Claude 3 Sonnet logo
Claude 3 Sonnet13 outputs, specs and price
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