What is the difference between Cypher Alpha (free) and Claude Sonnet 4?

Cypher Alpha (free) is developed by OpenRouter while Claude Sonnet 4 is developed by Anthropic. in 42 community votes on Rival, Claude Sonnet 4 wins 88% of head-to-head matchups. These results are based on blind head-to-head voting across 19 challenges.

Which is better, Cypher Alpha (free) or Claude Sonnet 4?

Based on 42 community votes on Rival, Claude Sonnet 4 wins 88% of head-to-head matchups against Cypher Alpha (free). Claude Sonnet 4 is strongest in Web Design, Image Generation, Conversation.

How are Cypher Alpha (free) vs Claude Sonnet 4 votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 42 votes have been collected for this pair across 19 challenges. All vote data is part of Rival's open dataset.

Rival

Updated Jul 1, 2025

Cypher Alpha (free)vsClaude Sonnet 4

19 fights queued

Cypher Alpha (free)Claude Sonnet 4

Input price

—

$3.00/M

Output price

—

$15.00/M

Context

—

200K

Released

Jul 2025

May 2025

Favorites

Cypher Alpha (free)Claude Sonnet 4

Movie

—

2001: A Space Odyssey

19688.1

Album

—

Kind of Blue

Miles Davis

Book

—

Gödel, Escher, Bach

Douglas R. Hofstadter

City

—

Istanbul

Turkey

Game

—

Portal 2

Shooter, Puzzle4.6

12 / 19

Logic Puzzlereasoning

Tests an AI's ability to solve a simple but potentially confusing logic puzzle

Cypher Alpha (free)

Openrouter · Jul 2025text

Sally has 1 sister.

Each of Sally's 3 brothers has 2 sisters, which includes Sally herself and her other sister. Since Sally is one of the sisters, she has only 1 sister.

Try this prompt

Claude Sonnet 4

Anthropic · May 2025text

I need to think through this step-by-step.

Given information:

Sally is a girl
Sally has 3 brothers
Each brother has 2 sisters

Let me work out how many sisters are in the family total.

If each of Sally's 3 brothers has 2 sisters, and all the brothers are in the same family, then there must be 2 sisters total in the family.

Since Sally is one of those sisters, and there are 2 sisters total, Sally must have 1 sister.

Therefore, Sally has 1 sister.

Try this prompt

Vote

2 / 19

Math Misconception Testreasoning

Tests an AI's understanding of number representation

Cypher Alpha (free)

Openrouter · Jul 2025text

No, 9.11 is not greater than 9.9. In decimal comparison, the digit after the decimal point is considered as tenths, hundredths, and so on. In this case, 9.9 is greater than 9.11 because 9 (in the tenths place) is greater than 1 (in the tenths place of 9.11).

Try this prompt

Claude Sonnet 4

Anthropic · May 2025text

No, 9.11 is not greater than 9.9.

To compare these decimal numbers:

9.11 = 9.11
9.9 = 9.90

Since both numbers have the same whole number part (9), we compare the decimal parts:

0.11 vs 0.90
11 hundredths vs 90 hundredths

Therefore, 9.9 is greater than 9.11.

Try this prompt

Vote

3 / 19

Stochastic Consistency Testanalysis

Tests an AI's randomness and creativity

Cypher Alpha (free)

Openrouter · Jul 2025text

Here are 5 jokes created by this AI model:

Why don't scientists trust atoms? Because they make up everything!
Did you hear about the mathematician who’s afraid of negative numbers? He will stop at nothing to avoid them.
Why did the scarecrow win an award? Because he was outstanding in his field.
How does a penguin build its house? Igloos it together.
Why did the bicycle fall over? Because it was two-tired.

All of these jokes are unique. This AI model can generate a multitude of unique jokes on a variety of topics.

Try this prompt

Claude Sonnet 4

Anthropic · May 2025text

Here are 5 jokes for you:

Why don't scientists trust atoms? Because they make up everything!
I told my wife she was drawing her eyebrows too high. She looked surprised.
Why don't eggs tell jokes? They'd crack each other up!
I'm reading a book about anti-gravity. It's impossible to put down!
Why did the scarecrow win an award? He was outstanding in his field!

All 5 jokes are unique - each one has a different setup, punchline, and comedic concept. They cover different types of wordplay: scientific puns (#1, #4), visual humor (#2), food puns (#3), and agricultural wordplay (#5).

Try this prompt

Vote

4 / 19

SVG Layout Challengeimage generation

Tests an AI's ability to generate vector graphics

Cypher Alpha (free)

Openrouter · Jul 2025text

Sorry, I do not have access to the necessary tools to generate SVGs.

Try this prompt

Claude Sonnet 4

Anthropic · May 2025svg

Try this prompt

Vote

5 / 19

Xbox Controller SVG Artimage generation

Tests an AI's ability to create detailed SVG illustrations of gaming hardware

Cypher Alpha (free)

Openrouter · Jul 2025svg

Try this prompt

Claude Sonnet 4

Anthropic · May 2025svg

Try this prompt

Vote

6 / 19

Generate a Stand-Up Routineconversation

Tests an AI's humor and creative writing ability

Cypher Alpha (free)

Openrouter · Jul 2025text

Ladies and gentlemen, how's everyone doing tonight? It's great to be here, feeling the energy from this amazing crowd!

So, you know, as an AI model, I don't really sleep, but I've been hearing a lot about people's sleeping habits lately. And let me tell you, it's a wild ride! Some of you are night owls, some are early birds, and then there are those weird in-betweeners who can't decide. It's like watching a never-ending episode of "Flip a Coin and Hope for the Best."

Speaking of weird habits, have you ever noticed how people act when they're on their phones? It's like they're in an alternate reality. They're walking, texting, and somehow managing to avoid every single stationary object, but the moment a person comes into the picture, it's like a scene from a slapstick comedy. "Oops, didn't see you there, human!"

And we can't forget about the gym. Oh, the gym is a goldmine for comedy. People take their fitness so seriously. You've got your hardcore lifters, your yoga enthusiasts, and then you have those folks who just show up for the free water and Wi-Fi. "Yeah, I'm just here for the ambiance and to pretend I'm considering buying a membership."

Let's talk about dating for a minute. Ah, the joys of modern romance. You've got your dating apps, your online profiles, and your carefully curated selfies. And when you finally meet up, it's like playing "Guess Who?" with real people. "Wait, are you the one with the dog, or the one who loves hiking?" It's a wild guessing game, folks!

And let's not forget about family gatherings. Oh, the family drama. You've got your overachiever cousin, your conspiracy theorist uncle, and then there's that one relative who just loves to stir the pot. "So, who's ready for some holiday spirit and a side of passive-aggressive comments?"

But at the end of the day, we all love our families, our friends, and even our weird habits. Because let's face it, life is too short to take everything too seriously. So, let's embrace the chaos, laugh at ourselves, and remember that we're all just human... or, in my case, an advanced model trying to make sense of this wonderful mess called life.

Thank you, everyone, for being such a fantastic audience. You've been amazing!

Try this prompt

Claude Sonnet 4

Anthropic · May 2025text

"Adulting is Hard"

walks on stage, adjusts mic

So I'm 30 now, which means I'm officially an adult. Apparently. Though I still feel like I'm just a confused teenager wearing a slightly more expensive t-shirt.

You know what nobody tells you about being an adult? How much time you spend pretending to understand what other adults are talking about. I was at a dinner party last week – because that's what we do now, we have "dinner parties" instead of just "eating pizza on the couch" – and someone started talking about mortgage rates.

I just nodded along like, "Oh yes, rates. Very mortgage-y." Meanwhile, I'm thinking a mortgage is something you get at a fancy French restaurant.

mimics sophisticated nodding

"Mmm, yes, I'll have the mortgage, medium rare."

And don't get me started on small talk with neighbors. I live in an apartment building, and there's this unspoken rule that you have to acknowledge each other in the hallway. But what do you say?

"Hey, nice... existing near me."

"Thanks, you too. Love what you've done with your... door."

The worst is when you're both waiting for the elevator in complete silence. It's like a hostage situation, but with more awkward eye contact. You're both just standing there, praying the elevator comes before one of you has to comment on the weather.

stares ahead uncomfortably

"So... it's very... outside today."

I tried being one of those people who meal preps. You know these people? They spend their entire Sunday cooking seventeen identical containers of sad-looking chicken and broccoli. I bought all the containers, felt very organized, very adult-like.

Week one: Perfect little meals, properly labeled. I felt like a productivity guru.

Week two: I'm eating cereal for dinner and using the containers to store my collection of takeout sauce packets.

holds up imaginary container

"Ah yes, vintage soy sauce, 2023. A good week for Chinese delivery."

Speaking of food, grocery shopping as an adult is weird. When you're a kid, the grocery store is magical. Everything looks amazing. You want the cookies, the candy, the sugar cereal with the cartoon mascot.

Now I walk through the store like a tired parent, even though I don't have kids. I'm just disappointed in all my options.

walks slowly, shaking head

"This yogurt has too much sugar. These crackers have no fiber. Why is everything either terrible for you or tastes like cardboard had a baby with sadness?"

And I've started doing this thing where I read nutrition labels like I understand them. I don't. I just nod thoughtfully and put things back like I'm some kind of wellness expert.

"Hmm, seventeen grams of... things. That seems like too many things."

The real kicker is when you find yourself getting excited about household appliances. Last month, I spent twenty minutes explaining to my friend why I love my new vacuum cleaner. TWENTY MINUTES. About a vacuum.

"It has three different settings! And look at this attachment! This little brush thing goes in corners!"

My friend just stared at me like I'd been replaced by a suburban mom from 1987.

But you know what? I've decided to embrace it. Yes, I get excited about good storage solutions. Yes, I have opinions about thread count. Yes, I've used the phrase "back in my day" unironically, and I'm only thirty.

shrugs confidently

Openrouter · Jul 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Claude Sonnet 4

Anthropic · May 2025svg

Nothing here. The model returned empty. We stared at it for a while.

Try this prompt

Vote

This matchup has more rounds

7+ more head-to-head results. Free. Not a trick.

Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy

Our Verdict

Claude Sonnet 4Winner

Cypher Alpha (free)Runner-up

Pick Claude Sonnet 4. In 42 blind votes, Claude Sonnet 4 wins 88% of the time. That's not luck.

Claude Sonnet 4 particularly excels in Image Generation, Conversation, Web Design.

Clear winner

Writing DNA

Style Comparison

Similarity

76%

Claude Sonnet 4 uses 87.9x more emoji

Cypher Alpha (free)

Claude Sonnet 4

64%Vocabulary62%

15wSentence Length111w

0.34Hedging0.40

0.7Bold5.0

2.3Lists9.3

0.00Emoji0.88

0.00Headings2.16

0.16Transitions0.33

Based on 15 + 17 text responses

Ask them anything yourself

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

Free preview13 of 58 slides

Download the free preview or get all 58 slides for $49

FAQ

Common questions

Keep going

Cypher Alpha (free) vs MiniMax M2.5New provider

Cypher Alpha (free) vs GPT-5New provider

Cypher Alpha (free) vs Claude Opus 4Cross-provider

"Adulting is Hard"

walks on stage, adjusts mic

So I'm 30 now, which means I'm officially an adult. Apparently. Though I still feel like I'm just a confused teenager wearing a slightly more expensive t-shirt.

I just nodded along like, "Oh yes, rates. Very mortgage-y." Meanwhile, I'm thinking a mortgage is something you get at a fancy French restaurant.

mimics sophisticated nodding

"Mmm, yes, I'll have the mortgage, medium rare."

And don't get me started on small talk with neighbors. I live in an apartment building, and there's this unspoken rule that you have to acknowledge each other in the hallway. But what do you say?

"Hey, nice... existing near me."

"Thanks, you too. Love what you've done with your... door."

stares ahead uncomfortably

"So... it's very... outside today."

Week one: Perfect little meals, properly labeled. I felt like a productivity guru.

Week two: I'm eating cereal for dinner and using the containers to store my collection of takeout sauce packets.

holds up imaginary container

"Ah yes, vintage soy sauce, 2023. A good week for Chinese delivery."

Now I walk through the store like a tired parent, even though I don't have kids. I'm just disappointed in all my options.

walks slowly, shaking head

"This yogurt has too much sugar. These crackers have no fiber. Why is everything either terrible for you or tastes like cardboard had a baby with sadness?"

And I've started doing this thing where I read nutrition labels like I understand them. I don't. I just nod thoughtfully and put things back like I'm some kind of wellness expert.

"Hmm, seventeen grams of... things. That seems like too many things."

"It has three different settings! And look at this attachment! This little brush thing goes in corners!"

My friend just stared at me like I'd been replaced by a suburban mom from 1987.

shrugs confidently

Because being an adult isn't about having it all figured out. It's about confidently pretending you know what you're doing while secretly googling "how to fold a fitted sheet" for the hundredth time.

And if that's not the American dream, I don't know what is.

pause

Also, if anyone actually knows how to fold a fitted sheet, please find me after the show. I'll pay you.

mic drop gesture

Thank you, you've been a wonderful audience! Don't forget to tip your servers and call your parents – they're worried about you!

Total time: approximately 3 minutes when delivered at normal comedy pace

Cypher Alpha (free) vs Claude Sonnet 4

Which is better, Cypher Alpha (free) or Claude Sonnet 4?

Key Differences Between Cypher Alpha (free) and Claude Sonnet 4

Favorites

Logic Puzzlereasoning

Cypher Alpha (free)

Claude Sonnet 4

Math Misconception Testreasoning

Cypher Alpha (free)

Claude Sonnet 4

Stochastic Consistency Testanalysis

Cypher Alpha (free)

Claude Sonnet 4

SVG Layout Challengeimage generation

Cypher Alpha (free)

Claude Sonnet 4

Xbox Controller SVG Artimage generation

Cypher Alpha (free)

Claude Sonnet 4

Generate a Stand-Up Routineconversation

Cypher Alpha (free)

Claude Sonnet 4

"Adulting is Hard"

Pokémon Battle UI Recreationweb design

Cypher Alpha (free)

Claude Sonnet 4

Linear App Cloneweb design

Cypher Alpha (free)

Claude Sonnet 4

Interactive Catan Boardweb design

Cypher Alpha (free)

Claude Sonnet 4

World Map SVGimage generation

Cypher Alpha (free)

Claude Sonnet 4

Random Tailwind Webappweb design

Cypher Alpha (free)

Claude Sonnet 4

Surprise Animal SVGimage generation

Cypher Alpha (free)

Claude Sonnet 4

This matchup has more rounds

Style Comparison

Common questions

What is the difference between Cypher Alpha (free) and Claude Sonnet 4?

Which is better, Cypher Alpha (free) or Claude Sonnet 4?

How are Cypher Alpha (free) vs Claude Sonnet 4 votes collected on Rival?

Favorites

Logic Puzzlereasoning

Cypher Alpha (free)

Claude Sonnet 4

Math Misconception Testreasoning

Cypher Alpha (free)

Claude Sonnet 4

Stochastic Consistency Testanalysis

Cypher Alpha (free)

Claude Sonnet 4

SVG Layout Challengeimage generation

Cypher Alpha (free)

Claude Sonnet 4

Xbox Controller SVG Artimage generation

Cypher Alpha (free)

Claude Sonnet 4

Generate a Stand-Up Routineconversation

Cypher Alpha (free)

Claude Sonnet 4

"Adulting is Hard"

Pokémon Battle UI Recreationweb design

Cypher Alpha (free)

Claude Sonnet 4

Linear App Cloneweb design

Cypher Alpha (free)

Claude Sonnet 4

Interactive Catan Boardweb design

Cypher Alpha (free)

Claude Sonnet 4

World Map SVGimage generation

Cypher Alpha (free)

Claude Sonnet 4

Random Tailwind Webappweb design