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-3.5 TurbovsNex-N2.5-Pro (free)
Updated Sep 2026

GPT-3.5 TurbovsNex-N2.5-Pro (free)

Nex-N2.5-Pro (free) is cheaper than GPT-3.5 Turbo at $0/M vs $1.5/M input tokens.

GPT-3.5 Turbo and Nex-N2.5-Pro (free) compared across 14 shared prompts
SpecGPT-3.5 TurboNex-N2.5-Pro (free)
Input price$1.5/M tokensFree
Output price$2/M tokensFree
Context window16K tokens262K tokens
WeightsClosed—
Free API (OpenRouter)NoYes (1 provider)
ReleasedMar 2022Sep 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 14 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-3.5 Turbo289 words
Week 1: Diet Start by incorporating more whole, unprocessed foods into your meals such as fruits, vegetables, whole grains, lean proteins, and healthy fats. Begin by adding 1 extra serving of vegetables to your meals each day. Replace sugary drinks with water or herbal tea.
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

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-3.5 Turbo134 words
Recipe: Honey Mustard Chicken Bake Ingredients: 4 boneless, skinless chicken breasts 1/2 cup honey 1/4 cup Dijon mustard 1 tablespoon olive oil 1 teaspoon garlic powder Salt and pepper to taste 1/2 cup shredded cheddar cheese Instructions: Preheat the oven to 375°F.
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

Michelin Star Recipe Design

Design an innovative recipe for a multi-component dish worthy of a Michelin 3-star restaurant. The recipe should feature an unusual…

GPT-3.5 Turbo466 words
Dish Name: Seared Duck Breast with Blackberry-Ginger Glaze, Sweet Potato Purée, and Charred Brussels Sprouts Conceptual Narrative: This dish is inspired by the harmony of sweet, savory, and spicy flavors coming together to create a symphony for the taste buds.
Read the full answer
Nex-N2.5-Pro (free)1,665 words
Dish: “Tidewater Orchard” Langoustine · Mirabelle Plum · Juniper · Kombu · Rye A tasting-menu course built around an unusual pairing: sweet cold-water langoustine with mirabelle plum, bridged by kombu umami, juniper resin, green tomato acidity, and toasted rye bitterness.
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

GPT-3.5 Turbo275 words
PAYMENT: The clause stating that payment is due within 90 days of invoice receipt could potentially be exploited against the contractor as it is a longer payment term than industry standard. This could result in cash flow issues for the contractor.
Read the full answer
Nex-N2.5-Pro (free)2,451 words
Below is a general contract-risk review, not legal advice. Enforceability depends heavily on jurisdiction, contractor classification, and the exact facts. Also, even if a clause might be unenforceable, relying on that is risky because litigation/arbitration is expensive.
Read the full answer

Startup Pitch Teardown

Here's a pitch deck summary for a startup called "MindMeld AI": **Slide 1 - Vision:** "We're building the future of human-AI collaboration.…

GPT-3.5 Turbo184 words
Problem: The claim that current BCI technology is too invasive is weak because it lacks specific evidence or examples to support it. To strengthen this claim, the pitch could provide examples of existing invasive BCI technologies, such as implanted electrodes or surgical procedures, and explain how MindMeld AI's…
Read the full answer
Nex-N2.5-Pro (free)593 words
The 3 weakest claims are the ones most likely to be challenged in diligence: Weakest claim Why it’s weak How to strengthen it 1. “94% accuracy… works with any language, any device.” This is the biggest scientific and product credibility risk.
Read the full answer

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

GPT-3.5 Turbo382 words
If the transistor had been invented in 1920 instead of 1947, it would have potentially accelerated technological advancements in various fields and had significant implications on the global economy and geopolitics.
Read the full answer
Nex-N2.5-Pro (free)2,726 words
Starting assumption Assume the 1920 “transistor” is a usable but crude solid-state amplifier/switch: reproducible enough for telecom and radio, but noisy, low-power, temperature-sensitive, and expensive at first.
Read the full answer
Our Verdict
Nex-N2.5-Pro (free)
Nex-N2.5-Pro (free)
GPT-3.5 Turbo
GPT-3.5 TurboRunner-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-3.5 Turbo
Input
$1.50
Output
$2.00
Nex-N2.5-Pro (free)
Input
$0.000
Output
$0.000
Where to run it

2 hosts

GPT-3.5 Turbo1 host
HostInOutContextUptime
OpenAI$0.50 in·$1.50 out·16k·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-3.5 Turbo is developed by OpenAI while Nex-N2.5-Pro (free) is developed by Nex AGI. GPT-3.5 Turbo has a 16K token context window vs Nex-N2.5-Pro (free)'s 262K. 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-3.5 Turbo 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.

GPT-3.5 Turbo costs $1.5/M input tokens and Nex-N2.5-Pro (free) costs $0/M input tokens. Nex-N2.5-Pro (free) is $1.50/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-3.5 Turbo 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-3.5 Turbo logoDeepSeek V4 Flash Vision Exp logo
GPT-3.5 Turbo 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-3.5 Turbo logoHy3 logo
GPT-3.5 Turbo 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-3.5 Turbo logoLing 3.0 Flash logo
GPT-3.5 Turbo 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-3.5 Turbo logoGLM 5.3 logo
GPT-3.5 Turbo 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-3.5 Turbo logoGPT-6 Astra Pro logo
GPT-3.5 Turbo vs GPT-6 Astra ProVersion compare
GPT-3.5 Turbo logoGPT-6 Astra logo
GPT-3.5 Turbo vs GPT-6 AstraVersion compare
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-4.1 Nano logo
Nex-N2.5-Pro (free) vs GPT-4.1 NanoCross-provider
Nex-N2.5-Pro (free) logoGPT-4.5 logo
Nex-N2.5-Pro (free) vs GPT-4.5Cross-provider
Nex-N2.5-Pro (free) logoGPT-4o (Omni) logo
Nex-N2.5-Pro (free) vs GPT-4o (Omni)Cross-provider
Nex-N2.5-Pro (free) logoGPT-4o mini logo
Nex-N2.5-Pro (free) vs GPT-4o miniCross-provider

Model pages

GPT-3.5 Turbo logo
GPT-3.5 Turbo58 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