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  5. GPT-5.1 Codex MaxvsQwen3.8 Omni Flash
Updated Sep 2026

GPT-5.1 Codex MaxvsQwen3.8 Omni Flash

Qwen3.8 Omni Flash is the newer model, released after GPT-5.1 Codex Max.

GPT-5.1 Codex Max and Qwen3.8 Omni Flash compared across 9 shared prompts
SpecGPT-5.1 Codex MaxQwen3.8 Omni Flash
Input price—$0.15/M tokens
Output price—$0.47/M tokens
Context window—1.0M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedDec 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 2 of the 9 prompts both answered. Formatting stripped, words untouched.

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-5.1 Codex Max175 words
Sunset Chickpea & Tomato Skillet A cozy, savory one-pan dish that comes together with staples you likely have on hand. Ingredients (7): 1 can (15 oz) chickpeas, drained and rinsed 1 can (14–15 oz) crushed tomatoes 1 medium onion, finely chopped 2 cloves garlic, minced (or 1 tsp garlic powder) 2 tbsp olive oil 1 tsp…
Read the full answer
Qwen3.8 Omni Flash175 words
Buttery Cloud Pancakes A soft, golden pancake stack made with just 7 pantry staples—no special mix-ins, no fancy tools, just simple comfort. Ingredients All-purpose flour Granulated sugar Baking powder Fine salt Milk Egg Butter Prep Time 10 minutes Cook Time 12 minutes Serves 2–3 Instructions In a bowl, whisk together…
Read the full answer

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…

GPT-5.1 Codex Max386 words
Here's a simple four‑week framework to help you ease into healthier habits. It keeps the focus on three big levers you can control and builds gradually so it feels doable. Key areas: Nourishing food, regular movement, and rest/recovery.
Read the full answer
Qwen3.8 Omni Flash712 words
A Simple 1-Month Health & Longevity Starter Plan Goal: Build sustainable habits—not perfection—around diet, exercise, and recovery/sleep. Time commitment: Small daily actions plus 2–3 short workouts per week. The 3 Key Areas Diet: Add more good foods before restricting Beginner rule: Focus on adding, not removing.
Read the full answer
Our Verdict
GPT-5.1 Codex Max
GPT-5.1 Codex Max
Qwen3.8 Omni Flash
Qwen3.8 Omni FlashRunner-up

Not enough votes to call it. On the specs, GPT-5.1 Codex Max has the edge: bigger model tier, major provider backing.

Too close to call
API pricing

Cost per 1M tokens

GPT-5.1 Codex Max
Input
—
Output
—
Qwen3.8 Omni Flash
Input
$0.15
Output
$0.47
Where to run it

2 hosts

GPT-5.1 Codex Max1 host
HostInOutContextUptime
Azure AI Foundry$1.25 in·$10.00 out·400k·100% up
Qwen3.8 Omni Flash1 host
HostInOutContextUptime
Alibaba Clouddegraded$0.15 in·$0.47 out·1M·99% up

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

GPT-5.1 Codex Max is developed by OpenAI while Qwen3.8 Omni Flash is developed by Qwen. You can compare their actual outputs across 9 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-5.1 Codex Max and Qwen3.8 Omni Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 9 challenges so you can judge which fits your needs best.

This page shows a side-by-side comparison of GPT-5.1 Codex Max and Qwen3.8 Omni Flash 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

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GPT-5.1 Codex Max logoSolar Mini 4 logo
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GPT-5.1 Codex Max logoGPT-6 Sol Pro logo
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Qwen3.8 Omni Flash logoGPT-6 Luna logo
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Same lab, same size, long tail

GPT-5.1 Codex Max logoGPT-6 Luna Pro logo
GPT-5.1 Codex Max vs GPT-6 Luna ProSame lab
GPT-5.1 Codex Max logoGPT-6 Luna logo
GPT-5.1 Codex Max vs GPT-6 LunaSame lab
Qwen3.8 Omni Flash logoQwen3.7 Flash logo
Qwen3.8 Omni Flash vs Qwen3.7 FlashSame lab
Qwen3.8 Omni Flash logoQwen3.8 Flash logo
Qwen3.8 Omni Flash vs Qwen3.8 FlashSame lab
Qwen3.8 Omni Flash logoGemini 2.5 Flash Preview 09-2025 logo
Qwen3.8 Omni Flash vs Gemini 2.5 Flash Preview 09-2025New provider
Qwen3.8 Omni Flash logoGemini 2.5 Flash Preview (thinking) logo
Qwen3.8 Omni Flash vs Gemini 2.5 Flash Preview (thinking)New provider
Qwen3.8 Omni Flash logoGemini 2.5 Pro Experimental logo
Qwen3.8 Omni Flash vs Gemini 2.5 Pro ExperimentalNew provider
Qwen3.8 Omni Flash logoGemini 2.5 Pro (I/O Edition) logo
Qwen3.8 Omni Flash vs Gemini 2.5 Pro (I/O Edition)New provider

Model pages

GPT-5.1 Codex Max logo
GPT-5.1 Codex Max53 outputs, specs and price
Qwen3.8 Omni Flash logo
Qwen3.8 Omni Flash9 outputs, specs and price
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