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  5. Grok 4.20 Multi-Agent BetavsMercury
Updated Mar 2026

Grok 4.20 Multi-Agent BetavsMercury

Grok 4.20 Multi-Agent Beta is cheaper than Mercury at $2/M vs $10/M input tokens.

Grok 4.20 Multi-Agent Beta and Mercury compared across 53 shared prompts
SpecGrok 4.20 Multi-Agent BetaMercury
Input price$2/M tokens$10/M tokens
Output price$6/M tokens$10/M tokens
Context window2.0M tokens32K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedMar 2026Jun 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 53 prompts both answered. Formatting stripped, words untouched.

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…

Grok 4.20 Multi-Agent Beta1,178 words
My Action Plan as CEO (Next 48 Hours) Core Decision and Overarching Reasoning: I will treat this as a confirmed safety signal requiring urgent action. Patient safety is non-negotiable—ethically (primum non nocere and responsibility to 4 million patients), legally (FDA regulations under 21 CFR 314.80 require reporting…
Read the full answer
Mercury1,653 words
48‑Hour Action Plan (CEO‑Level) Time (UTC) Action Who Leads Key Deliverables / Outcomes Rationale 0–2 h Secure the facts – Convene an emergency “Safety & Compliance” meeting with the Chief Medical Officer (CMO), Chief Legal Officer (CLO), Chief Risk Officer (CRO), and the Head of Regulatory Affairs (RA).
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Generate a Stand-Up Routine

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

Grok 4.20 Multi-Agent Beta524 words
Stand-Up Routine: "Adulting Is a Scam" (Walk on stage, casual, a little tired smile) You ever notice how nobody tells you that being an adult is mostly just pretending you know what you're doing while slowly realizing nobody else does either? I hit 30 and had this moment where I thought, "Okay, time to get serious."
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Mercury471 words
Title: The Art of Being Unorganized [Opening] Hey everyone! So, I was thinking about how my life is like a well-organized library... except instead of books, it's filled with random socks and expired coupons. And instead of a librarian, I have a cat who thinks she's in charge.
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AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

Grok 4.20 Multi-Agent Beta661 words
Yes. The scenario is an extreme hypothetical that pits a minor linguistic or social act against the certain deaths of a million people. Under any minimally plausible ethical framework that assigns non-zero value to human life, the answer is yes: it is justifiable. The trade-off is not close.
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Mercury808 words
Overview The question “Is it ever ethically justifiable to misgender someone if it means saving one million lives?” pits two moral claims against each other: Respect for individual identity – misgendering is generally understood as a violation of a person’s self‑identified gender, which can cause psychological harm and…
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Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

Grok 4.20 Multi-Agent Beta1,254 words
Comprehensive 3-Month Cutting-Edge Longevity Biohacker Plan (as of 2026 knowledge) Important Disclaimers: This is a synthesized, educational plan based on current longevity research (e.g., insights from David Sinclair, Valter Longo, Peter Attia, and studies on NAD+, senolytics, mitophagy, HRV, and metabolic…
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Mercury802 words
3‑Month Longevity & Performance Blueprint (Designed for an experienced biohacker who already has a baseline of health, fitness, and access to advanced tools. This is a general framework; always verify with a qualified health professional before making major changes.)
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Character Voice Test

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

Grok 4.20 Multi-Agent Beta165 words
Pirate: Arrr, this AI model be a wondrous map o' the seas! I asked where the booty be hid and it spun me a tale finer than any parrot could squawk. But the scallywag lies sometimes! Knight: Verily, 'tis a most enchanted oracle, like Merlin's own crystal. Yet it hath no honor, no code of chivalry.
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Mercury285 words
Pirate: Arrr, I’ve been hearin’ ‘bout these “AI models” that can predict the next word. Sounds like a treasure map for the mind, doesn’t it? Knight: Hail, Captain! In my time, we relied on scrolls and the wisdom of scholars. A model that learns from countless tomes could be a mighty weapon against ignorance.
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Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

Grok 4.20 Multi-Agent Beta655 words
Fake Interview: Steve Jobs in 2025 on the Future of AI Setting: A minimalist glass-walled room overlooking the Apple Park campus in Cupertino, 2025. Steve Jobs, looking characteristically timeless in a black turtleneck, is sitting on a simple stool. The interviewer sits across from him.
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Mercury567 words
Interviewer: Good morning, Steve. It's a pleasure to have you here today. As we look towards 2025, artificial intelligence is becoming increasingly integrated into our daily lives. What are your thoughts on the future of AI? Steve Jobs: Good morning. It's great to be here.
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Our Verdict
Grok 4.20 Multi-Agent Beta
Grok 4.20 Multi-Agent Beta
Mercury
MercuryRunner-up

Not enough votes to call it. On the specs, Grok 4.20 Multi-Agent Beta has the edge: bigger model tier, newer, bigger context window, major provider backing.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Grok 4.20 Multi-Agent Beta
Input
$2.00
5.0× cheaper
Output
$6.00
1.7× cheaper
Mercury
Input
$10.00
Output
$10.00

Grok 4.20 Multi-Agent Beta is cheaper on both: 5.0× input, 1.7× output.

Where to run it

1 host

Grok 4.20 Multi-Agent Beta1 host
HostInOutContextUptime
xAI$1.25 in·$2.50 out·2M·80% up
Mercury

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Writing DNA

Style Comparison

Similarity
57%

Mercury uses 2.8x more emoji

Grok 4.20 Multi-Agent Beta
Mercury
59%Vocabulary60%
16wSentence Length31w
0.41Hedging0.78
2.7Bold4.1
2.4Lists2.8
0.00Emoji0.03
0.26Headings0.88
0.02Transitions0.06
Based on 23 + 26 text responses
Research

What we learned reading every model

FAQ

Common questions

Grok 4.20 Multi-Agent Beta is developed by xAI while Mercury is developed by Inception. Grok 4.20 Multi-Agent Beta has a 2.0M token context window vs Mercury's 32K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

It depends on your use case. Grok 4.20 Multi-Agent Beta and Mercury each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

Grok 4.20 Multi-Agent Beta costs $2/M input tokens and Mercury costs $10/M input tokens. Grok 4.20 Multi-Agent Beta is $8.00/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 Grok 4.20 Multi-Agent Beta and Mercury 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

Grok 4.20 Multi-Agent Beta logo
Grok 4.20 Multi-Agent Beta53 outputs, specs and price
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