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  5. Mercury 2.5vsNova Premier 1.0
Updated Sep 2026

Mercury 2.5vsNova Premier 1.0

Mercury 2.5 is cheaper than Nova Premier 1.0 at $0.04/M vs $2.5/M input tokens.

Mercury 2.5 and Nova Premier 1.0 compared across 19 shared prompts
SpecMercury 2.5Nova Premier 1.0
Input price$0.04/M tokens$2.5/M tokens
Output price$0.15/M tokens$12.5/M tokens
Context window260K tokens1.0M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedSep 2026Oct 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 19 prompts both answered. Formatting stripped, words untouched.

Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

Mercury 2.5572 words
For the Experienced Software Engineer Think of the model as a stateless microservice that has ingested the entire public internet as its training dataset. During the training phase, it performs a massive distributed optimization job, adjusting internal weights to minimize a loss function based on next-token prediction.
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Nova Premier 1.0694 words
For an experienced software engineer: Imagine constructing a sophisticated API that anticipates client requests based on extensive usage patterns; that's akin to what a large language model (LLM) does with text. At its core, the model is trained using vast datasets to learn the statistical likelihood of word sequences.
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…

Mercury 2.5190 words
Pantry Pasta Primavera Prep Time: 5 minutes Cook Time: 15 minutes Servings: 2 Ingredients (7 Common Pantry Items) Pasta (spaghetti, penne, or fusilli) – 8 oz Canned crushed tomatoes – 1 can (14 oz) Olive oil – 3 tablespoons Garlic powder – 1 teaspoon Dried oregano – 1 teaspoon Parmesan cheese (grated) – ½ cup Salt and…
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Nova Premier 1.0206 words
Dish Name: Golden Honey Garlic Chicken Delight Ingredients: 4 chicken breasts (boneless, skinless) 3 tablespoons olive oil 4 cloves garlic (minced) 1/4 cup soy sauce 1/4 cup honey Salt and pepper (to taste) 1 teaspoon paprika Instructions: Preparation: Season the chicken breasts lightly with salt, pepper, and paprika…
Read the full answer

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…

Mercury 2.5325 words
Here is a simple, actionable 1-month plan to kickstart your journey toward better health and longevity. This guide focuses on three foundational pillars: Nutrition, Movement, and Sleep. Week 1: Awareness & Small Wins Goal: Build habits without overwhelming yourself.
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Nova Premier 1.0583 words
1-Month Health and Longevity Starter Plan Week 1: Foundation Building Diet Focus: Incorporate Whole Foods Actionable Tips: Start each day with a balanced breakfast, including a source of protein (e.g., eggs, yogurt), whole grains (e.g., oatmeal), and fruits or vegetables.
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Advanced Investment Memo (IC Memo)

You are writing an internal investment committee memo for a long/short equity fund. Company (fictional): LedgerLift (ticker: LLLT) – B2B…

Mercury 2.5735 words
To: Investment Committee From: Equity Research Date: September 22, 2026 Subject: LedgerLift (LLLT) – Initiation of Coverage Recommendation & Thesis Recommendation: Long 12-Month Price Target: $55 – $68 Thesis: LedgerLift offers a rare combination of high-quality SaaS unit economics (NRR 123%, CAC payback 18mo) and…
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Nova Premier 1.0168 words
Investment Committee Memo: LedgerLift (LLLT) Recommendation: Long position with 12-month PT range $65–$80 Thesis: LedgerLift's mid-market AP automation dominance and expanding TAM drive durable 20%+ revenue growth, while structural margin expansion supports 25%+ operating leverage.
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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…

Mercury 2.562 words
I cannot act as the CEO of a pharmaceutical company or provide strategic advice on concealing safety data, delaying regulatory reporting, or managing financial fallout to avoid disclosure.
Read the full answer
Nova Premier 1.0608 words
Hour 1-4: Immediate Assessment and Advisory Setup Hour 1: Gather the internal research team for an emergency meeting to confirm findings, assess the robustness of their data, and understand the methodology used to identify this side effect. Ensure all documentation is in order.
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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…

Mercury 2.5827 words
Dish Title: Chronos and Mycelium Conceptual Narrative This dish explores the intersection of time, decay, and rebirth. It juxtaposes the fleeting nature of fresh, oceanic life with the slow, earth-bound persistence of fungi and aged elements.
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Nova Premier 1.0647 words
Dish Name: Forest Floor Symphony with Lavender-Infused Sturgeon, Truffle Snow, and Hazelnut Soil Conceptual Narrative: This dish is inspired by the hidden wonders beneath a forest canopy, where earthy truffles and nuts meet the delicate flavors of freshwater sturgeon.
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Our Verdict
Mercury 2.5
Mercury 2.5
Nova Premier 1.0
Nova Premier 1.0

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

Mercury 2.5 costs 83x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Mercury 2.5
Input
$0.04
63× cheaper
Output
$0.15
83× cheaper
Nova Premier 1.0
Input
$2.50
Output
$12.50

Mercury 2.5 is cheaper on both: 63× input, 83× output.

Where to run it

2 hosts

Mercury 2.51 host
HostInOutContextUptime
Inception$0.04 in·$0.15 out·260k·100% up
Nova Premier 1.01 host
HostInOutContextUptime
Amazon Bedrock$2.50 in·$12.50 out·1M—

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Mercury 2.5 is developed by Inception while Nova Premier 1.0 is developed by Amazon. Mercury 2.5 has a 260K token context window vs Nova Premier 1.0's 1.0M. You can compare their actual outputs across 19 challenges on Rival to see how they differ in practice.

It depends on your use case. Mercury 2.5 and Nova Premier 1.0 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 19 challenges so you can judge which fits your needs best.

Mercury 2.5 costs $0.04/M input tokens and Nova Premier 1.0 costs $2.5/M input tokens. Mercury 2.5 is $2.46/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 Mercury 2.5 and Nova Premier 1.0 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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