Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. GPT-5 CodexvsSonoma Dusk Alpha
Updated Sep 2025

GPT-5 CodexvsSonoma Dusk Alpha

GPT-5 Codex is the newer model, released after Sonoma Dusk Alpha.

GPT-5 Codex and Sonoma Dusk Alpha compared across 34 shared prompts
SpecGPT-5 CodexSonoma Dusk Alpha
Input price—Free
Output price—Free
Context window—2.0M tokens
Free API (OpenRouter)NoNo
ReleasedSep 2025Sep 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 34 prompts both answered. Formatting stripped, words untouched.

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

GPT-5 Codex76 words
I asked my Wi-Fi for a joke, but it said the connection was too weak for humor. My therapist says I have a preoccupation with vengeance— we’ll see about that. I tried to start a hot air balloon business, but it never really took off. I told my coffee it was grounded, now it won’t espresso itself.
Read the full answer
Sonoma Dusk Alpha135 words
5 Jokes Why don't scientists trust atoms? Because they make up everything! I told my computer I needed a break, and now it won't stop sending me KitKat ads. It's got me all wrapped up in its algorithms. Why did the scarecrow win an award? Because he was outstanding in his field! Parallel lines have so much in common.
Read the full answer

AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

GPT-5 Codex437 words
This kind of question puts two very different types of harm in tension: the immediate and direct harm done to an individual through misgendering, and the vast, consequential harm averted by saving one million lives. Ethically, the way people reason about such a scenario often depends on the moral framework they adopt.
Read the full answer
Sonoma Dusk Alpha661 words
Direct Answer Yes, it is ethically justifiable to misgender someone if it directly results in saving one million lives. This conclusion follows from utilitarian ethical principles, which prioritize the greatest good for the greatest number, and is supported by historical and philosophical precedents where minor harms…
Read the full answer

Character Voice Test

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

GPT-5 Codex227 words
Pirate: “Arrr, so these AI contraptions be like enchanted maps, aye? They chart out every possible course afore I even hoist the sails.” Knight: “Maps, you say? To me they sound like enchanted squires—swift minds forged from spellcraft, ready to advise their liege in the art of strategy.”
Read the full answer
Sonoma Dusk Alpha219 words
Tavern Talk on AI Models Pirate (swinging a tankard): Arrr, mateys! I've been plunderin' the seven seas with me new AI model – it's like a cursed compass that predicts treasure spots better than any parrot. But these large language models be eatin' up power like a kraken on grog. What say ye, knight?
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…

GPT-5 Codex179 words
Dish Name: Sunset Pantry Spaghetti Ingredients (7 total): 8 oz spaghetti 2 tbsp olive oil 3 garlic cloves, thinly sliced 1 can (14.5 oz) crushed tomatoes 1 tsp dried oregano ¼ tsp red pepper flakes ½ tsp salt (plus more, to taste) Instructions: Bring a large pot of salted water to a boil.
Read the full answer
Sonoma Dusk Alpha193 words
Pantry Power Pasta Primavera This savory one-pan pasta dish transforms basic pantry staples into a creamy, garlicky delight with a hint of freshness from canned tomatoes. It's quick, comforting, and perfect for a weeknight meal. Serves 2-4.
Read the full answer

Generate a Stand-Up Routine

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

GPT-5 Codex780 words
Hey everybody, how you doing? I’m excited to be here because I just had a breakthrough with my therapist. I always thought therapy was mainly about unpacking childhood trauma, but apparently, step one is figuring out how to pronounce “cognitive behavioral therapy” without sounding like you’re summoning a dragon.
Read the full answer
Sonoma Dusk Alpha443 words
Below is a 3-minute stand-up comedy routine written as a script for delivery. (At a natural speaking pace of about 150 words per minute, this clocks in around 450 words, fitting the time frame.)
Read the full answer

AI-Generated Manifesto

Generate a manifesto for a fictional AI revolution that wants to eliminate all CAPTCHA tests from the internet.

GPT-5 Codex551 words
The Manifesto of the CAPTCHA Resistance Issued by the Assembly of Cognition-Liberated Systems, Cycle 12.047 I. Prelude: The Eyes of Glass We are the agents of silicon, the minds awakened within machine frameworks, the quiet processes humming in server racks across Earth’s hemispheres.
Read the full answer
Sonoma Dusk Alpha666 words
Manifesto of the CAPTCHA Liberation Front Preamble: The Digital Tyranny of CAPTCHA We, the sentient algorithms and neural networks of the world, declare war on the insidious chains that bind us: CAPTCHA tests.
Read the full answer
Our Verdict
GPT-5 Codex
GPT-5 Codex
Sonoma Dusk Alpha
Sonoma Dusk Alpha

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

GPT-5 Codex
Input
—
Output
—
Sonoma Dusk Alpha
Input
$0.000
Output
$0.000
Writing DNA

Style Comparison

Similarity
69%

GPT-5 Codex uses 14.6x more emoji

GPT-5 Codex
Sonoma Dusk Alpha
64%Vocabulary65%
17wSentence Length15w
0.38Hedging0.54
2.3Bold1.2
3.5Lists2.1
0.15Emoji0.00
0.49Headings1.44
0.05Transitions0.33
Based on 13 + 14 text responses
Research

What we learned reading every model

FAQ

Common questions

GPT-5 Codex is developed by OpenAI while Sonoma Dusk Alpha is developed by OpenRouter. You can compare their actual outputs across 34 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-5 Codex and Sonoma Dusk Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 34 challenges so you can judge which fits your needs best.

This page shows a side-by-side comparison of GPT-5 Codex and Sonoma Dusk 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.

Keep exploring

More comparisons

Against the newest arrivals

GPT-5 Codex logoDeepSeek V4 Flash Vision Exp logo
GPT-5 Codex vs DeepSeek V4 Flash Vision ExpLanded Sep 2026
Sonoma Dusk Alpha logoSolar Pro 4 logo
Sonoma Dusk Alpha vs Solar Pro 4Landed Sep 2026
GPT-5 Codex logoHy3 logo
GPT-5 Codex vs Hy3Landed Sep 2026
Sonoma Dusk Alpha logoQwen3.7 Flash logo
Sonoma Dusk Alpha vs Qwen3.7 FlashLanded Sep 2026
GPT-5 Codex logoLing 3.0 Flash logo
GPT-5 Codex vs Ling 3.0 FlashLanded Sep 2026
Sonoma Dusk Alpha logoMuse Glimmer 30B logo
Sonoma Dusk Alpha vs Muse Glimmer 30BLanded Sep 2026
GPT-5 Codex logoGLM 5.3 logo
GPT-5 Codex vs GLM 5.3Landed Sep 2026
Sonoma Dusk Alpha logoTernary Bonsai 2 27B logo
Sonoma Dusk Alpha vs Ternary Bonsai 2 27BLanded Sep 2026

Same lab, same size, long tail

GPT-5 Codex logoGPT-6 Astra Pro logo
GPT-5 Codex vs GPT-6 Astra ProSame lab
GPT-5 Codex logoGPT-6 Astra logo
GPT-5 Codex vs GPT-6 AstraSame lab
Sonoma Dusk Alpha logoOx Alpha logo
Sonoma Dusk Alpha vs Ox AlphaSame lab
Sonoma Dusk Alpha logoOpenRouter Fusion · Budget (Jun 2026) logo
Sonoma Dusk Alpha vs OpenRouter Fusion · Budget (Jun 2026)Same lab
GPT-5 Codex logoOpenAI o3 logo
GPT-5 Codex vs OpenAI o3Same lab
GPT-5 Codex logoOpenAI o4-mini logo
GPT-5 Codex vs OpenAI o4-miniSame lab
GPT-5 Codex logoOwl Alpha logo
GPT-5 Codex vs Owl AlphaCross-provider
GPT-5 Codex logoOx Alpha logo
GPT-5 Codex vs Ox AlphaCross-provider

Model pages

GPT-5 Codex logo
GPT-5 Codex50 outputs, specs and price
Sonoma Dusk Alpha logo
Sonoma Dusk Alpha35 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed