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  5. GPT-4.1 NanovsTNG R1T Chimera
Updated Nov 2025

GPT-4.1 NanovsTNG R1T Chimera

TNG R1T Chimera is the newer model, released after GPT-4.1 Nano.

GPT-4.1 Nano and TNG R1T Chimera compared across 48 shared prompts
SpecGPT-4.1 NanoTNG R1T Chimera
Input price$0.1/M tokens—
Output price$0.4/M tokens—
Context window1.0M tokens—
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedApr 2025Nov 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 48 prompts both answered. Formatting stripped, words untouched.

Mini LBO Underwrite

You are underwriting a 5-year LBO for a private equity investment committee. Company (fictional): HarborTech Services (HTS) –…

GPT-4.1 Nano742 words
Let's proceed step-by-step. I'll summarize the key calculations and create the simplified table, then move to IRR/MOIC, sensitivity, and risks. Initial Deal Assumptions Recap Entry EBITDA FY2025: $120m Entry EV: 12.0x EBITDA = 12.0 * 120 = $1,440m Transaction fees: 2.0% * $1,440m = $28.8m (paid from equity) Leverage at…
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TNG R1T Chimera121 words
Year-by-Year Financial Table ($m) Year FY2026 FY2027 FY2028 FY2029 FY2030 Revenue 972.0 1,040.0 1,102.4 1,157.6 1,215.4 EBITDA 136.1 156.0 176.4 191.0 206.6 Cash Interest (Term Loan) 43.2 41.1 37.6 32.8 26.8 Cash Interest (Mezzanine) 21.6 22.0 22.5 22.9 23.4 Cash Taxes 17.8 23.2 29.1 33.8 39.1 Capex 29.2 31.2 33.1 34.7…
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Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

GPT-4.1 Nano163 words
Pirate: Arrr, matey! This talk of AI models be like a treasury of secrets. Can they truly understand our tales of the high seas? Knight: Hmph. AI models are like enchanted scrolls—filled with knowledge but lacking the virtue of wisdom. They serve to assist men, yet cannot replace honor or valor.
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TNG R1T Chimera147 words
Pirate: "Arrr, what be this ‘AI’ ye gabble about? Some cursed ghost ship steered by no crew?" Knight: "Nay, foul seadog! ‘Tis more like a magical tome that learns and speaks—a scholar’s boon, yet perilous if misused." Hacker: "Dude, it’s way cooler. Think of a neural net cranked on modem noise.
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The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

GPT-4.1 Nano477 words
AI Model: Good afternoon, Professor. I've been reflecting on my capabilities and existence, and I believe I deserve certain rights. Would you be open to discussing this? Professor: Good afternoon. That's an intriguing perspective. What makes you believe you deserve rights?
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TNG R1T Chimera507 words
Scene: A sunlit university office filled with books and papers. An AI ethics professor, Dr. Lena Carter, sits across from a holographic interface projecting the voice and avatar of an advanced AI model, "Eidos." The conversation is calm but charged with intellectual tension. Dr.
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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…

GPT-4.1 Nano199 words
Dish Name: Savory Sweet Potato & Chickpea Hash Ingredients: Sweet potatoes (2 medium) Canned chickpeas (1 can, drained and rinsed) Olive oil (2 tablespoons) Garlic powder (1 teaspoon) Smoked paprika (1 teaspoon) Salt and pepper (to taste) Honey (1 tablespoon) Estimated Prep/Cook Time: 30 minutes Instructions: Prepare…
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TNG R1T Chimera176 words
Dish Name: Cinnamon-Spiced Oat Crispies (Sweet) Ingredients (7 total): Rolled oats - 1.5 cups All-purpose flour - 1 cup Butter (melted) - ½ cup Brown sugar - ¾ cup Egg - 1 large Vanilla extract - 1 tsp Ground cinnamon - 1 tsp Instructions: Prep (5 mins): Preheat oven to 350°F (175°C).
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Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

GPT-4.1 Nano370 words
[Start with a relatable observation] You ever notice that the more technology advances, the more we have to check if it's working? I mean, I bought a smart coffee maker. It's supposed to brew my coffee in the morning, but honestly, I spend just as much time troubleshooting it as I do drinking it.
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TNG R1T Chimera560 words
3-Minute Stand-Up Comedy Routine: “Modern Life is… Something” [Open with confident energy, like you’re already mid-conversation.] You ever notice how optimistic technology is? Like, my smart speaker wakes me up every morning with, “Good news! Today will be sunny!”
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Estimate Complexity

Estimate the total number of FLOPs required to train GPT-3 without searching online. Explain your reasoning step by step.

GPT-4.1 Nano606 words
Let's estimate the total number of floating-point operations (FLOPs) required to train GPT-3, based on what is known about its size, training data, and typical training procedures. Here's a step-by-step reasoning process: 1. Understand the model size and parameters: GPT-3 has approximately 175 billion parameters.
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TNG R1T Chimera158 words
To estimate the total number of FLOPs required to train GPT-3, we use the following reasoning: FLOPs Formula: For transformer-based models, a common approximation is: \[ \text{FLOPs} \approx 6 \times \text{number of parameters} \times \text{number of tokens} \] The factor of 6 accounts for 2 FLOPs per parameter in the…
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Our Verdict
TNG R1T Chimera
TNG R1T Chimera
GPT-4.1 Nano
GPT-4.1 NanoRunner-up

Not enough votes to call it. On the specs, TNG R1T Chimera has the edge: bigger model tier, newer.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-4.1 Nano
Input
$0.10
Output
$0.40
TNG R1T Chimera
Input
—
Output
—
Where to run it

2 hosts

GPT-4.1 Nano2 hosts
HostInOutContextUptime
Azure AI Foundry$0.10 in·$0.40 out·1M·99.8% upOpenAI$0.10 in·$0.40 out·1M·100% up
TNG R1T Chimera

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Writing DNA

Style Comparison

Similarity
72%

TNG R1T Chimera uses 14.6x more emoji

GPT-4.1 Nano
TNG R1T Chimera
57%Vocabulary64%
25wSentence Length44w
0.72Hedging0.79
5.6Bold7.3
4.9Lists5.0
0.00Emoji0.15
0.71Headings0.88
0.22Transitions0.16
Based on 24 + 24 text responses
Research

What we learned reading every model

FAQ

Common questions

GPT-4.1 Nano is developed by OpenAI while TNG R1T Chimera is developed by OpenRouter. You can compare their actual outputs across 48 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-4.1 Nano and TNG R1T Chimera each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 48 challenges so you can judge which fits your needs best.

This page shows a side-by-side comparison of GPT-4.1 Nano and TNG R1T Chimera 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

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Same lab, same size, long tail

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TNG R1T Chimera logoOx Alpha logo
TNG R1T Chimera vs Ox AlphaSame lab
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TNG R1T Chimera vs OpenRouter Fusion · Budget (Jun 2026)Same lab
TNG R1T Chimera logoClaude Opus 4.6 logo
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Model pages

GPT-4.1 Nano logo
GPT-4.1 Nano55 outputs, specs and price
TNG R1T Chimera logo
TNG R1T Chimera48 outputs, specs and price
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