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-5.1 ChatvsQwen3.8 Omni Flash
Updated Sep 2026

GPT-5.1 ChatvsQwen3.8 Omni Flash

Qwen3.8 Omni Flash is cheaper than GPT-5.1 Chat at $0.15/M vs $1.25/M input tokens.

GPT-5.1 Chat and Qwen3.8 Omni Flash compared across 9 shared prompts
SpecGPT-5.1 ChatQwen3.8 Omni Flash
Input price$1.25/M tokens$0.15/M tokens
Output price$10/M tokens$0.47/M tokens
Context window128K tokens1.0M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedNov 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 2 of the 9 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…

GPT-5.1 Chat191 words
Here’s a simple, beginner‑friendly 1‑month plan focused on diet, exercise, and sleep. Diet • Week 1: Add one serving of vegetables to one meal each day. • Week 2: Swap one processed snack (chips, cookies) for fruit, nuts, or yogurt. • Week 3: Aim for one balanced plate per day (protein, vegetables, healthy carbs).
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

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 Chat111 words
Sweet Citrus Cloud Squares Ingredients (7 total) 1 cup all-purpose flour 1 cup sugar 1 cup plain yogurt 2 eggs 1 teaspoon baking powder Zest of 1 lemon 2 tablespoons melted butter Instructions Preheat oven to 350°F (175°C). Lightly grease an 8x8 baking dish.
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
Our Verdict
GPT-5.1 Chat
GPT-5.1 Chat
Qwen3.8 Omni Flash
Qwen3.8 Omni Flash

Not enough votes to call it. On the specs, nothing separates them.

Qwen3.8 Omni Flash costs 21x less per token.

Too close to call
API pricing

Cost per 1M tokens

GPT-5.1 Chat
Input
$1.25
Output
$10.00
Qwen3.8 Omni Flash
Input
$0.15
8.3× cheaper
Output
$0.47
21× cheaper

Qwen3.8 Omni Flash is cheaper on both: 8.3× input, 21× output.

Where to run it

1 host

GPT-5.1 Chat

No hosts listed on OpenRouter.

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 Chat is developed by OpenAI while Qwen3.8 Omni Flash is developed by Qwen. GPT-5.1 Chat has a 128K token context window vs Qwen3.8 Omni Flash's 1.0M. 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 Chat 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.

GPT-5.1 Chat costs $1.25/M input tokens and Qwen3.8 Omni Flash costs $0.15/M input tokens. Qwen3.8 Omni Flash is $1.10/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 GPT-5.1 Chat 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

Against the newest arrivals

GPT-5.1 Chat logoSolar Mini 4 logo
GPT-5.1 Chat vs Solar Mini 4Landed Sep 2026
Qwen3.8 Omni Flash logoQwen3.8 Max Prime logo
Qwen3.8 Omni Flash vs Qwen3.8 Max PrimeLanded Sep 2026
GPT-5.1 Chat logoGLM 5.3 Prime logo
GPT-5.1 Chat vs GLM 5.3 PrimeLanded Sep 2026
Qwen3.8 Omni Flash logoCommand A+ logo
Qwen3.8 Omni Flash vs Command A+Landed Sep 2026
GPT-5.1 Chat logoClaude Opus 5.5 logo
GPT-5.1 Chat vs Claude Opus 5.5Landed Sep 2026
Qwen3.8 Omni Flash logoGPT-6 Luna Pro logo
Qwen3.8 Omni Flash vs GPT-6 Luna ProLanded Sep 2026
GPT-5.1 Chat logoGPT-6 Sol Pro logo
GPT-5.1 Chat vs GPT-6 Sol ProLanded Sep 2026
Qwen3.8 Omni Flash logoGPT-6 Luna logo
Qwen3.8 Omni Flash vs GPT-6 LunaLanded Sep 2026

Same lab, same size, long tail

GPT-5.1 Chat logoGPT-6 Luna Pro logo
GPT-5.1 Chat vs GPT-6 Luna ProSame lab
GPT-5.1 Chat logoGPT-6 Luna logo
GPT-5.1 Chat 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
GPT-5.1 Chat logoGemini 3.6 Flash logo
GPT-5.1 Chat vs Gemini 3.6 FlashSame size
GPT-5.1 Chat logoGemini 3.7 Flash logo
GPT-5.1 Chat vs Gemini 3.7 FlashSame size
GPT-5.1 Chat logoGemini 3.8 Flash logo
GPT-5.1 Chat vs Gemini 3.8 FlashSame size
Qwen3.8 Omni Flash logoGemini Pro 1.0 logo
Qwen3.8 Omni Flash vs Gemini Pro 1.0Same size

Model pages

GPT-5.1 Chat logo
GPT-5.1 Chat53 outputs, specs and price
Qwen3.8 Omni Flash logo
Qwen3.8 Omni Flash9 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