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 NanovsNex-N2.5-Pro (free)
Updated Sep 2026

GPT-5 NanovsNex-N2.5-Pro (free)

Nex-N2.5-Pro (free) is the newer model, released after GPT-5 Nano.

GPT-5 Nano and Nex-N2.5-Pro (free) compared across 14 shared prompts
SpecGPT-5 NanoNex-N2.5-Pro (free)
Input price—Free
Output price—Free
Context window—262K tokens
WeightsClosed—
Free API (OpenRouter)NoYes (1 provider)
ReleasedAug 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 2 of the 14 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 Nano196 words
Sunlit Lemon-Garlic Pasta A bright, quick dish using seven common pantry staples. Ingredients 8 oz spaghetti (or any pasta) 2 tablespoons olive oil 3 cloves garlic, minced 1 lemon (zest and juice) 1/2 teaspoon salt (to taste) 1/4 teaspoon black pepper 1/4 teaspoon red pepper flakes Instructions Bring a large pot of…
Read the full answer
Nex-N2.5-Pro (free)119 words
Pantry Moon Bars A sweet, chewy peanut butter–chocolate oat treat made with only 7 pantry staples. Ingredients Rolled oats Creamy peanut butter Honey Chocolate chips Vanilla extract Ground cinnamon Salt Instructions Heat oven to 350°F / 175°C. Line an 8-inch square pan with parchment paper.
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 Nano1,089 words
Here’s a simple, actionable 1-month plan focused on three beginner-friendly pillars: Diet, Movement (exercise), and Sleep. It’s designed to be easy to start, with small weekly progressions you can actually stick to.
Read the full answer
Nex-N2.5-Pro (free)518 words
1-Month Beginner Health & Longevity Plan Goal: Build simple habits you can keep—not perfection. Focus on 3 areas: diet, exercise, and sleep/stress. Diet: Eat for steady energy Week 1: Add before you subtract Add 1 fruit or vegetable to 2 meals per day. Drink a glass of water when you wake up and before meals.
Read the full answer
Our Verdict
Nex-N2.5-Pro (free)
Nex-N2.5-Pro (free)
GPT-5 Nano
GPT-5 NanoRunner-up

Not enough votes to call it. On the specs, Nex-N2.5-Pro (free) has the edge: bigger model tier, newer, bigger context window.

Too close to call
API pricing

Cost per 1M tokens

GPT-5 Nano
Input
—
Output
—
Nex-N2.5-Pro (free)
Input
$0.000
Output
$0.000
Where to run it

3 hosts

GPT-5 Nano2 hosts
HostInOutContextUptime
Azure AI Foundry$0.05 in·$0.40 out·400k·99.9% upOpenAI$0.05 in·$0.40 out·400k·100% up
Nex-N2.5-Pro (free)1 host
HostInOutContextUptime
NNex AGIfp8degraded$0 in·$0 out·262k·99.2% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

GPT-5 Nano is developed by OpenAI while Nex-N2.5-Pro (free) is developed by Nex AGI. You can compare their actual outputs across 14 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-5 Nano and Nex-N2.5-Pro (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 14 challenges so you can judge which fits your needs best.

This page shows a side-by-side comparison of GPT-5 Nano and Nex-N2.5-Pro (free) 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 Nano logoDeepSeek V4 Flash Vision Exp logo
GPT-5 Nano vs DeepSeek V4 Flash Vision ExpLanded Sep 2026
Nex-N2.5-Pro (free) logoSolar Pro 4 logo
Nex-N2.5-Pro (free) vs Solar Pro 4Landed Sep 2026
GPT-5 Nano logoHy3 logo
GPT-5 Nano vs Hy3Landed Sep 2026
Nex-N2.5-Pro (free) logoQwen3.7 Flash logo
Nex-N2.5-Pro (free) vs Qwen3.7 FlashLanded Sep 2026
GPT-5 Nano logoLing 3.0 Flash logo
GPT-5 Nano vs Ling 3.0 FlashLanded Sep 2026
Nex-N2.5-Pro (free) logoMuse Glimmer 30B logo
Nex-N2.5-Pro (free) vs Muse Glimmer 30BLanded Sep 2026
GPT-5 Nano logoGLM 5.3 logo
GPT-5 Nano vs GLM 5.3Landed Sep 2026
Nex-N2.5-Pro (free) logoTernary Bonsai 2 27B logo
Nex-N2.5-Pro (free) vs Ternary Bonsai 2 27BLanded Sep 2026

Same lab, same size, long tail

GPT-5 Nano logoGPT-6 Astra Pro logo
GPT-5 Nano vs GPT-6 Astra ProSame lab
GPT-5 Nano logoGPT-6 Astra logo
GPT-5 Nano vs GPT-6 AstraSame lab
Nex-N2.5-Pro (free) logoNex-N2.5-Mini (free) logo
Nex-N2.5-Pro (free) vs Nex-N2.5-Mini (free)Same lab
Nex-N2.5-Pro (free) logoOx Alpha logo
Nex-N2.5-Pro (free) vs Ox AlphaSame size
Nex-N2.5-Pro (free) logoGPT-5.6 Luna logo
Nex-N2.5-Pro (free) vs GPT-5.6 LunaCross-provider
Nex-N2.5-Pro (free) logoGPT-5.6 Luna Pro logo
Nex-N2.5-Pro (free) vs GPT-5.6 Luna ProCross-provider
Nex-N2.5-Pro (free) logoGPT-5.6 Sol logo
Nex-N2.5-Pro (free) vs GPT-5.6 SolCross-provider
Nex-N2.5-Pro (free) logoGPT-5.6 Terra logo
Nex-N2.5-Pro (free) vs GPT-5.6 TerraSame size

Model pages

GPT-5 Nano logo
GPT-5 Nano59 outputs, specs and price
Nex-N2.5-Pro (free) logo
Nex-N2.5-Pro (free)14 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