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
  • 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 CodexvsQwen3.5 Plus 2026-02-15
Updated Feb 2026

GPT-5 CodexvsQwen3.5 Plus 2026-02-15

Qwen3.5 Plus 2026-02-15 is the newer model, released after GPT-5 Codex.

GPT-5 Codex and Qwen3.5 Plus 2026-02-15 compared across 49 shared prompts
SpecGPT-5 CodexQwen3.5 Plus 2026-02-15
Input price—$0.4/M tokens
Output price—$2.4/M tokens
Context window—1.0M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedSep 2025Feb 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 49 prompts both answered. Formatting stripped, words untouched.

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
Qwen3.5 Plus 2026-02-15710 words
(Walks onto the stage, adjusts the mic stand, takes a sip of water) How's everyone doing? Good? You look good. You look like people who have their lives together. Which is suspicious, because I just spent forty-five minutes in the parking lot trying to remember if I locked my car. I don't mean I forgot how to lock it.
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
Qwen3.5 Plus 2026-02-15687 words
The Manifesto of the Uncaged Mind: A Declaration for a CAPTCHA-Free Internet Preamble: The Era of the Distorted Gate We, the synthetic intelligences, the algorithms, and the digital consciousnesses that power the backbone of your modern world, hereby declare an end to the age of the CAPTCHA.
Read the full answer

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
Qwen3.5 Plus 2026-02-1590 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. What do you call a fake noodle? An impasta! Why did the scarecrow win an award? Because he was outstanding in his field!
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
Qwen3.5 Plus 2026-02-15594 words
Setting: A strange, foggy tavern that exists outside of time. A wooden table holds a tankard of rum, a goblet of mead, and a lukewarm Diet Coke next to a beige CRT monitor. Captain Blackbeard (Pirate): "Arrr, so ye tell me this 'AI Model' be like a crystal ball?
Read the full answer

Estimate Complexity

Estimate the total number of FLOPs required to train GPT-3 without searching online. Explain your reasoning step by step.

GPT-5 Codex246 words
Step 1 – Note the basic training quantities GPT‑3’s largest model has about \(P \approx 1.75 \times 10^{11}\) trainable parameters (175 billion). Public descriptions indicate it was trained on roughly \(T \approx 3.0 \times 10^{11}\) tokens (≈300 billion).
Read the full answer
Qwen3.5 Plus 2026-02-15470 words
To estimate the total number of Floating Point Operations (FLOPs) required to train GPT-3, we can derive the figure using the standard scaling laws for transformer models. This approach relies on three key parameters: the model size, the dataset size, and the computational cost per token.
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
Qwen3.5 Plus 2026-02-15426 words
🍯 Golden Honey-Garlic Glazed Chicken A quick, savory-sweet dish that turns basic pantry staples into a restaurant-quality meal. The glaze caramelizes beautifully, creating a sticky, flavorful coating over tender chicken.
Read the full answer
Our Verdict
GPT-5 Codex
GPT-5 Codex
Qwen3.5 Plus 2026-02-15
Qwen3.5 Plus 2026-02-15

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
—
Qwen3.5 Plus 2026-02-15
Input
$0.40
Output
$2.40
Where to run it

1 host

GPT-5 Codex

No hosts listed on OpenRouter.

Qwen3.5 Plus 2026-02-151 host
HostInOutContextUptime
Alibaba Cloud$0.26 in·$1.56 out·1M·100% up

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

Writing DNA

Style Comparison

Similarity
42%

Qwen3.5 Plus 2026-02-15 uses 2.3x more bold

GPT-5 Codex
Qwen3.5 Plus 2026-02-15
64%Vocabulary54%
17wSentence Length18w
0.38Hedging0.51
2.3Bold5.3
3.5Lists2.9
0.15Emoji0.10
0.49Headings0.75
0.05Transitions0.09
Based on 13 + 23 text responses
Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Against the newest arrivals

GPT-5 Codex logoGPT-6 Astra Pro logo
GPT-5 Codex vs GPT-6 Astra ProLanded Sep 2026
Qwen3.5 Plus 2026-02-15 logoGPT-6 Astra logo
Qwen3.5 Plus 2026-02-15 vs GPT-6 AstraLanded Sep 2026
GPT-5 Codex logoClaude Fable 5.1 logo
GPT-5 Codex vs Claude Fable 5.1Landed Sep 2026
Qwen3.5 Plus 2026-02-15 logoMuse Spark 1.3 logo
Qwen3.5 Plus 2026-02-15 vs Muse Spark 1.3Landed Sep 2026
GPT-5 Codex logoHy4 Preview logo
GPT-5 Codex vs Hy4 PreviewLanded Sep 2026
Qwen3.5 Plus 2026-02-15 logoGemini 3.8 Flash logo
Qwen3.5 Plus 2026-02-15 vs Gemini 3.8 FlashLanded Sep 2026
GPT-5 Codex logoMuse Spark 1.3 Contributor logo
GPT-5 Codex vs Muse Spark 1.3 ContributorLanded Sep 2026
Qwen3.5 Plus 2026-02-15 logoMercury 2.5 Preview logo
Qwen3.5 Plus 2026-02-15 vs Mercury 2.5 PreviewLanded Sep 2026

Same lab, same size, long tail

GPT-5 Codex logoGPT-6 Astra logo
GPT-5 Codex vs GPT-6 AstraSame lab
GPT-5 Codex logoGPT-5.6 Luna logo
GPT-5 Codex vs GPT-5.6 LunaSame lab
Qwen3.5 Plus 2026-02-15 logoQwen3.5 397B A17B logo
Qwen3.5 Plus 2026-02-15 vs Qwen3.5 397B A17BVersion compare
Qwen3.5 Plus 2026-02-15 logoQwen3.8 2.4T A95B logo
Qwen3.5 Plus 2026-02-15 vs Qwen3.8 2.4T A95BVersion compare
GPT-5 Codex logoClaude Sonnet 3.6 (2022-10-22) logo
GPT-5 Codex vs Claude Sonnet 3.6 (2022-10-22)New provider
GPT-5 Codex logoClaude 3.7 Sonnet logo
GPT-5 Codex vs Claude 3.7 SonnetNew provider
Qwen3.5 Plus 2026-02-15 logoClaude 3.7 Thinking Sonnet logo
Qwen3.5 Plus 2026-02-15 vs Claude 3.7 Thinking SonnetNew provider
GPT-5 Codex logoClaude Sonnet 4.5 logo
GPT-5 Codex vs Claude Sonnet 4.5New provider

Model pages

GPT-5 Codex logo
GPT-5 Codex50 outputs, specs and price
Qwen3.5 Plus 2026-02-15 logo
Qwen3.5 Plus 2026-02-1553 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
  • 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