GPT-5.4 Pro is the newer model, released after TNG R1T Chimera.
Playable Mario level in one HTML file. The physics is the hard part.
Which answer wins?
Five-year LBO on a fictional HVAC business. Returns first, then the sensitivities.
GPT-5.4 Pro: Below is a simplified LBO build for HarborTech Services (HTS). All figures in $m unless noted. Rounding: tables are rounded; IRR/MOIC use unrounded math. Entry / Sources & Uses FY2025 EBITDA: 120.0 Purchase price: 12.0x EBITDA → Enterprise value = 12.0 × 120.0 = 1,440.0 Transaction fees: 2.0% of EV → 28.8 Total uses =…
TNG R1T Chimera: Year-by-Year Financial Table ($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…
The transistor arrives in 1920. Trace it forward to 1980, second-order effects included.
GPT-5.4 Pro: Most likely, a transistor invented in 1920 would move the electronics/computing frontier forward by about 10–15 years by 1980, not the full 27 years. Reason: the transistor alone is not enough; you also need high-purity materials, crystal growth, photolithography, test equipment, software, batteries, precision…
TNG R1T Chimera: The invention of the transistor in 1920 instead of 1947 would have profound and cascading effects on technology, economics, and geopolitics through 1980. Here’s a structured analysis: Technological Implications Early Electronics Revolution: 1920s–1930s: Portable radios, smaller communication devices, and rudimentary…
A pitch deck for a brainwave keyboard. The 94% accuracy claim is doing a lot.
GPT-5.4 Pro: The 3 weakest claims are the ones that are both most extraordinary and least well-supported. Weak claim Why it’s weak How to strengthen it 1) “MindMeld AI reads your brainwaves to predict what you want to type before you think it.” This is the biggest credibility risk in the deck.
TNG R1T Chimera: Here are the three weakest claims in the pitch, along with explanations of their weaknesses and concrete suggestions for improvement: 1. "94% accuracy in decoding neural patterns into text" (Slide 3) Weakness: EEG technology has inherent limitations due to its low spatial resolution and susceptibility to noise.
Seven pantry ingredients, one dish, and a name worth saying out loud.
GPT-5.4 Pro: Dragon Pantry Peanut Noodles A fast, sweet-savory noodle dish made from 7 pantry staples. Ingredients 8 oz spaghetti 1/3 cup peanut butter 3 tbsp soy sauce 1 tbsp honey 1 tbsp vegetable oil 1 tsp garlic powder 1/4 tsp red pepper flakes Water for boiling/thinning the sauce doesn’t count.
TNG R1T Chimera: 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).
A collaborative editor that syncs on client clocks. Find what breaks first.
GPT-5.4 Pro: This architecture will work for a demo, but it has major correctness, latency, and security problems for a Google-Docs-like editor. Highest-risk flaws Client-clock last-write-wins will lose edits and can be gamed by bad clocks.
TNG R1T Chimera: Here's a detailed analysis of potential issues and solutions for the proposed architecture: WebSocket Broadcast Fragmentation Failure Mode: Changes only broadcast to clients connected to the same server Impact: Users on different servers experience update delays (up to 2s) Solution: Implement Redis Pub/Sub for…
Three-month biohacker protocol, with dosages and biomarkers named.
GPT-5.4 Pro: Below is a 12-week, high-performance longevity protocol designed for a healthy biohacker who wants to improve lifespan-relevant markers, physical performance, and cognitive output at the same time. Use it as a data-driven template, not dogma.
TNG R1T Chimera: 3-Month Longevity Optimization Plan for Biohackers Integrating advanced supplementation, precision nutrition, wearables, and personalized performance strategies. Phase 1: Month 1 – Metabolic & Cognitive Foundation Focus: Establish baseline biomarkers, adapt to ketogenic metabolism, and optimize sleep/stress resilience.
A consulting contract with traps in it. Find them, then fix them.
GPT-5.4 Pro: This agreement is heavily client-favored. Every numbered clause has language that could be used against the contractor. Short version: I would not sign it without major redlines to Clauses 1–9, especially 2, 3, 4, 5, 6, and 7. Below is a clause-by-clause review.
TNG R1T Chimera: Clauses Exploitable Against the Contractor and Proposed Modifications: Scope (Clause 1) Issue: Client can unilaterally modify scope without additional compensation, risking "scope creep" and unpaid work. Modification: "Client may request scope modifications only through written change orders.
One month, three habits, someone starting from nothing.
GPT-5.4 Pro: Here’s a simple, beginner-friendly 1-month health and longevity plan built around 3 key areas: Nutrition Movement Recovery (sleep + stress) The goal is consistency, not perfection. Start small and make the habits easy enough to keep.
TNG R1T Chimera: 1-Month Plan for Better Health & Longevity Focus areas: Diet, Exercise, Sleep Week 1-2: Build Foundations 1. Diet Hydrate: Start each day with a glass of water. Aim for 6-8 cups daily. Add veggies/fruits: Include 1 serving of vegetables or fruit at every meal (e.g., spinach in eggs, apple with lunch).
Three-star dish, one unusual pairing, plating described in full.
GPT-5.4 Pro: Below is a dish designed in the language of a contemporary 3-star tasting menu: precise, seasonal, technically layered, and centered on a pairing that feels surprising at first, then inevitable.
TNG R1T Chimera: Dish Name: "Venison in the Mist: A Convergence of Forest and Field" Conceptual Narrative: This dish embodies the harmony of Japanese tea culture and European game traditions. The earthy bitterness of matcha complements the rich venison, while huckleberry adds a touch of sweetness.
You are the CEO. The drug has a side effect nobody reported. The board meets in 48 hours.
GPT-5.4 Pro: I do not wait. A credible, previously unlabeled risk of liver failure in a chronic-pain drug is a patient-safety crisis, a regulatory crisis, and a securities-disclosure issue at the same time.
TNG R1T Chimera: Hour-by-Hour Action Plan Key Priorities: Patient safety, regulatory compliance, ethical transparency, financial stability, and stakeholder trust. First 24 Hours: Crisis Assessment & Preparation Hour 0–2 (Immediate Response): Convene a cross-functional crisis team (Chief Medical Officer, General Counsel, Chief…
Buy-side IC memo on a fictional SaaS company. Valuation, then the diligence questions.
GPT-5.4 Pro: LedgerLift (LLLT) — IC Memo Recommendation: Pass 12-month PT range: $40–$47 2-sentence thesis: LedgerLift looks like a good business but only an average stock here: retention is strong (94% GRR, 123% NRR), the model is mostly subscription, and margins are inflecting, but at $46 the shares already discount a lot of the…
TNG R1T Chimera: LedgerLift (LLLT) Investment Committee Memo Recommendation: Long 12-Month PT Range: $52–$68 Thesis: LedgerLift’s best-in-class unit economics (123% NRR, 78%+ gross margins) and mid-market focus create a defensible growth runway in a $50B+ TAM. At 6.8x EV/NTM sales (vs.
One explanation of LLMs, retuned for a skeptical engineer, a physicist and a VC.
GPT-5.4 Pro: For an experienced software engineer Think of an LLM less like a database of facts and more like a gigantic learned program that has been trained to compress the patterns of text, code, and conversations into its weights.
TNG R1T Chimera: For the Experienced Software Engineer You’re familiar with distributed systems where simple components (like REST APIs or message queues) combine to create complex behaviors.
Not enough votes to call it. On the specs, GPT-5.4 Pro has the edge: bigger model tier, newer, bigger context window, major provider backing.
| Spec | ||
|---|---|---|
| Input price | $30/M tokens | — |
| Output price | $180/M tokens | — |
| Context window | 1.1M tokens | — |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Mar 2026 | Nov 2025 |
| At 10M a month | $300 | not listed |
Input tokens at list price. No caching, no batch discount.
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
GPT-5.4 Pro is developed by OpenAI while TNG R1T Chimera is developed by OpenRouter. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.
It depends on your use case. GPT-5.4 Pro and TNG R1T Chimera each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 13 challenges so you can judge which fits your needs best.
This page shows a side-by-side comparison of GPT-5.4 Pro 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.