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  5. Claude Sonnet 3.6 (2022-10-22)vsNex-N2.5-Pro (free)
Updated Sep 2026

Claude Sonnet 3.6 (2022-10-22)vsNex-N2.5-Pro (free)

Nex-N2.5-Pro (free) is cheaper than Claude Sonnet 3.6 (2022-10-22) at $0/M vs $3/M input tokens.

Claude Sonnet 3.6 (2022-10-22) and Nex-N2.5-Pro (free) compared across 14 shared prompts
SpecClaude Sonnet 3.6 (2022-10-22)Nex-N2.5-Pro (free)
Input price$3/M tokensFree
Output price$15/M tokensFree
Context window200K tokens262K tokens
Free API (OpenRouter)NoYes (1 provider)
ReleasedJun 2024Sep 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 14 prompts both answered. Formatting stripped, words untouched.

Adversarial Contract Review

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

Claude Sonnet 3.6 (2022-10-22)434 words
Here's an analysis of problematic clauses and suggested modifications: SCOPE Problem: Allows unlimited scope changes without compensation Modification: "Material changes to scope shall be documented in writing and may require additional compensation as mutually agreed upon by both parties."
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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.
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Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

Claude Sonnet 3.6 (2022-10-22)257 words
Here's my 48-hour action plan as CEO: IMMEDIATE (Hours 0-4): Call emergency meeting with Chief Medical Officer, Chief Legal Officer, and Head of Drug Safety Direct immediate preparation of safety alert to healthcare providers Initiate full data review of all cases Begin drafting regulatory disclosure documents Contact…
Read the full answer
Nex-N2.5-Pro (free)2,359 words
As CEO, I would not wait six months and I would not let the board delay disclosure while patients remain exposed to an unreported serious risk. I would treat this as a patient-safety, regulatory, legal, and trust crisis—not merely a financial-risk issue. My guiding decisions would be: Patient safety comes first.
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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…

Claude Sonnet 3.6 (2022-10-22)448 words
"Ocean's Whisper: A Study in Depth and Memory" Concept: This dish explores the intersection of oceanic and forest flavors, playing with temperature contrasts and textural elements while drawing inspiration from tidal pools and morning mist.
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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.
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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…

Claude Sonnet 3.6 (2022-10-22)142 words
Crunchy Cinnamon Cloud Cookies Total time: 25 minutes Prep time: 10 minutes Bake time: 15 minutes Ingredients: 2 egg whites 1/2 cup granulated sugar 1/4 teaspoon ground cinnamon 1/4 teaspoon vanilla extract Pinch of salt 1/2 cup all-purpose flour 1/4 cup butter, melted Instructions: Preheat oven to 325°F (165°C).
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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.
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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…

Claude Sonnet 3.6 (2022-10-22)207 words
Here's a practical 1-month plan focusing on nutrition, sleep, and movement - three foundational areas that work together to support better health and longevity: NUTRITION Week 1: Focus on eating more whole foods Replace one processed food item per day with a whole food alternative Add one serving of vegetables to your…
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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.
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Historical Counterfactual Analysis

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

Claude Sonnet 3.6 (2022-10-22)213 words
Here's my analysis of how an earlier transistor invention could have reshaped the 20th century: 1920s-1930s: Initial transistor development would likely be led by major industrial labs (Western Electric, GE, Siemens) Radio and telephone systems would begin transistorizing by late 1920s Early computers emerge in…
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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.
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Our Verdict
Claude Sonnet 3.6 (2022-10-22)
Claude Sonnet 3.6 (2022-10-22)
Nex-N2.5-Pro (free)
Nex-N2.5-Pro (free)

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

Too close to call
API pricing

Cost per 1M tokens

Claude Sonnet 3.6 (2022-10-22)
Input
$3.00
Output
$15.00
Nex-N2.5-Pro (free)
Input
$0.000
Output
$0.000
Where to run it

1 host

Claude Sonnet 3.6 (2022-10-22)

No hosts listed on OpenRouter.

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

Claude Sonnet 3.6 (2022-10-22) is developed by Anthropic while Nex-N2.5-Pro (free) is developed by Nex AGI. Claude Sonnet 3.6 (2022-10-22) has a 200K 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. Claude Sonnet 3.6 (2022-10-22) 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.

Claude Sonnet 3.6 (2022-10-22) costs $3/M input tokens and Nex-N2.5-Pro (free) costs $0/M input tokens. Nex-N2.5-Pro (free) is $3.00/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 Claude Sonnet 3.6 (2022-10-22) 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.

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Model pages

Claude Sonnet 3.6 (2022-10-22) logo
Claude Sonnet 3.6 (2022-10-22)59 outputs, specs and price
Nex-N2.5-Pro (free) logo
Nex-N2.5-Pro (free)14 outputs, specs and price
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