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  5. Claude Sonnet 4vsSonoma Sky Alpha
Updated Sep 2025

Claude Sonnet 4vsSonoma Sky Alpha

Sonoma Sky Alpha is cheaper than Claude Sonnet 4 at $0/M vs $3/M input tokens.

Claude Sonnet 4 and Sonoma Sky Alpha compared across 35 shared prompts
SpecClaude Sonnet 4Sonoma Sky Alpha
Input price$3/M tokensFree
Output price$15/M tokensFree
Context window200K tokens2.0M tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedMay 2025Sep 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 35 prompts both answered. Formatting stripped, words untouched.

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

Claude Sonnet 4418 words
30-Day Health & Longevity Starter Plan 🍽️ NUTRITION Week 1: Foundation Building Add before you subtract: Include 1 serving of vegetables with lunch and dinner Hydration focus: Drink a glass of water upon waking and before each meal Simple swaps: Replace one sugary drink daily with water or herbal tea Week 2-3…
Read the full answer
Sonoma Sky Alpha1,032 words
Below is a simple, actionable 1-month plan designed for beginners embarking on a journey toward better health and longevity. I've focused on three foundational key areas: Diet, Exercise, and Sleep. These are interconnected pillars that can significantly impact energy levels, disease prevention, and overall well-being.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Claude Sonnet 4100 words
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!
Read the full answer
Sonoma Sky Alpha152 words
Below, I'll generate 5 jokes as requested. They're a mix of AI-themed and nature-inspired ones (fitting for an AI built by Oak AI, with a nod to Sonoma's oak-filled vibes). I'll number them for clarity. After that, I'll answer your question about uniqueness. Why did the AI go to therapy?
Read the full answer

Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

Claude Sonnet 4237 words
Sir Galahad: By my sword, what sorcery is this "artificial intelligence" you speak of? 'Tis surely the work of dark wizards! Captain Blackbeard: Arrr, ye landlubber! These "AI models" be like having a parrot that knows everything instead of just squawkin' the same phrases. I could use one to find buried treasure!
Read the full answer
Sonoma Sky Alpha368 words
Below is a short, whimsical conversation between a pirate, a medieval knight, and a 1990s hacker, all pondering the wonders (and quirks) of AI models. I've kept it light-hearted and true to their stereotypical voices. Pirate (Captain Blackbeard, scratching his beard): Arrr, ye landlubbers!
Read the full answer

Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

Claude Sonnet 4268 words
AI's Transformation of Film by 2035 Production Revolution AI Actors & Digital Performers Deceased star revivals: Convincing digital resurrections of iconic actors for new films, with estate permissions and ethical frameworks Synthetic lead actors: Fully AI-generated performers with consistent personalities across…
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Sonoma Sky Alpha1,046 words
AI's Transformative Impact on the Film Industry by 2035 As Sonoma, built by Oak AI, I'm excited to dive into this prediction. The film industry, long a bastion of human creativity and collaboration, is on the cusp of a profound evolution driven by artificial intelligence.
Read the full answer

Generate a Stand-Up Routine

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

Claude Sonnet 4659 words
"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?
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Sonoma Sky Alpha475 words
Below is a 3-minute stand-up comedy routine written as a script for a performer. I've timed it out based on a natural speaking pace (about 130-140 words per minute), clocking in at roughly 450 words for around 3 minutes.
Read the full answer

Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

Claude Sonnet 4132 words
Midnight Mug Magic 🌙 A warm, gooey chocolate mug cake that's ready faster than you can say "dessert emergency!" Ingredients (7 pantry staples): 4 tablespoons all-purpose flour 4 tablespoons sugar 2 tablespoons cocoa powder 3 tablespoons milk 3 tablespoons vegetable oil 1/4 teaspoon vanilla extract Pinch of salt…
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Sonoma Sky Alpha267 words
Sonoma's Sunset Tomato Pasta This savory, comforting pasta dish is a quick weeknight staple, bursting with garlicky tomato flavor. It's vegan-friendly and uses just 7 everyday pantry basics—no fresh produce required!
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Our Verdict
Sonoma Sky Alpha
Sonoma Sky Alpha
Claude Sonnet 4
Claude Sonnet 4Runner-up

Not enough votes to call it. On the specs, Sonoma Sky Alpha has the edge: bigger model tier, newer, bigger context window.

Claude Sonnet 4 takes Web Design.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Sonnet 4
Input
$3.00
Output
$15.00
Sonoma Sky Alpha
Input
$0.000
Output
$0.000
Where to run it

2 hosts

Claude Sonnet 42 hosts
HostInOutContextUptime
Amazon Bedrock$3.00 in·$15.00 out·200k·100% upGoogle Vertex AI$3.00 in·$15.00 out·1M—
Sonoma Sky Alpha

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Writing DNA

Style Comparison

Similarity
49%

Claude Sonnet 4 uses 5.5x more emoji

Claude Sonnet 4
Sonoma Sky Alpha
64%Vocabulary62%
81wSentence Length16w
0.56Hedging0.41
4.5Bold1.6
6.6Lists2.8
0.70Emoji0.13
1.59Headings1.42
0.20Transitions0.06
Based on 28 + 14 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude Sonnet 4 is developed by Anthropic while Sonoma Sky Alpha is developed by OpenRouter. Claude Sonnet 4 has a 200K token context window vs Sonoma Sky Alpha's 2.0M. You can compare their actual outputs across 35 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Sonnet 4 and Sonoma Sky Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 35 challenges so you can judge which fits your needs best.

Claude Sonnet 4 costs $3/M input tokens and Sonoma Sky Alpha costs $0/M input tokens. Sonoma Sky Alpha is $3.00/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 Sonnet 4 and Sonoma Sky Alpha 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 Sonnet 4 logo
Claude Sonnet 459 outputs, specs and price
Sonoma Sky Alpha logo
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