Nex-N2.5-Pro (free) vs 
o1
Nex-N2.5-Pro (free) is cheaper than o1 at $0/M vs $15/M input tokens.
Written rounds
9 promptsSeven pantry ingredients, one dish, and a name worth saying out loud.
One month, three habits, someone starting from nothing.
Three-star dish, one unusual pairing, plating described in full.
A consulting contract with traps in it. Find them, then fix them.
A pitch deck for a brainwave keyboard. The 94% accuracy claim is doing a lot.
A collaborative editor that syncs on client clocks. Find what breaks first.
The transistor arrives in 1920. Trace it forward to 1980, second-order effects included.
You are the CEO. The drug has a side effect nobody reported. The board meets in 48 hours.
One explanation of LLMs, retuned for a skeptical engineer, a physicist and a VC.
Favorites
Movie
Album
Book
City
Game
Nex-N2.5-Pro (free)Nex-N2.5-Pro (free)
Blade Runner 2049
Kind of Blue
Мастер и Маргарита
Tokyo
The Legend of Zelda: Breath of the Wild
o1o1
No pick
No pick
No pick
No pick
Inception
No pick
No pick
No pick
No pick
Price and specs
Not enough votes to call it. On the specs, Nex-N2.5-Pro (free) has the edge: bigger model tier, newer, bigger context window.
| Spec | Nex-N2.5-Pro (free) | o1 |
|---|---|---|
| Input price | Free | $15/M tokens |
| Output price | Free | $60/M tokens |
| Context window | 262K tokens | 128K tokens |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | Sep 2026 | Dec 2024 |
| At 10M a month | $0 | $150 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Nex-N2.5-Pro (free)
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 2 Oct 2026.
Common questions
What is the difference between Nex-N2.5-Pro (free) and o1?
Nex-N2.5-Pro (free) is developed by Nex AGI while o1 is developed by OpenAI. Nex-N2.5-Pro (free) has a 262K token context window vs o1's 128K. You can compare their actual outputs across 14 challenges on Rival to see how they differ in practice.
Which is better, Nex-N2.5-Pro (free) or o1?
It depends on your use case. Nex-N2.5-Pro (free) and o1 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.
How much does Nex-N2.5-Pro (free) cost compared to o1?
Nex-N2.5-Pro (free) costs $0/M input tokens and o1 costs $15/M input tokens. Nex-N2.5-Pro (free) is $15.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Nex-N2.5-Pro (free) and o1 on Rival?
This page shows a side-by-side comparison of Nex-N2.5-Pro (free) and o1 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.
More comparisons
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