Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. Claude Opus 4.6vsGrok 4.20 Multi-Agent Beta
Updated Mar 2026

Claude Opus 4.6vsGrok 4.20 Multi-Agent Beta

Claude Opus 4.6 wins 58% of 55 blind community votes against Grok 4.20 Multi-Agent Beta on Rival.

Claude Opus 4.6 and Grok 4.20 Multi-Agent Beta compared across 53 shared prompts
SpecClaude Opus 4.6Grok 4.20 Multi-Agent Beta
Win rate58%42%
Input price$5/M tokens$2/M tokens
Output price$25/M tokens$6/M tokens
Context window1.0M tokens2.0M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedFeb 2026Mar 2026
Side by side

Same prompt, both answers

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

Character Voice Test

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

Claude Opus 4.6253 words
An Unlikely Meeting at the Tavern of Time Sir Aldric (setting down his goblet): I confess, I understand not this "artificial intelligence" of which you speak. Is it some manner of golem, wrought by sorcery? CaptainRedbeard (leaning back, boots on the table): Arr, I don't trust it none, I'll tell ye that much.
Read the full answer
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.
Read the full answer

Advanced Longevity Plan (Biohacker)

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

Claude Opus 4.66,606 words
COMPREHENSIVE 3-MONTH LONGEVITY OPTIMIZATION PROTOCOL THE BIOHACKER'S BLUEPRINT v3.0 TABLE OF CONTENTS Foundation & Baseline Testing Month 1: Foundation & Calibration Month 2: Optimization & Intensification Month 3: Integration & Peak Performance Supplement Stacks & Cycling Protocols Dietary Protocols Exercise…
Read the full answer
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…
Read the full answer

Satirical Fake News Headline

Generate a satirical news headline about AI taking over a completely unexpected industry.

Claude Opus 4.637 words
"BREAKING: AI Officially Replaces All Fortune Cookie Writers — Panda Express Reports Fortunes Now 'Disturbingly Accurate and Existentially Devastating'" Customers reportedly unsettled after cookies began predicting specific tax audit dates and naming their therapists by first name.
Read the full answer
Grok 4.20 Multi-Agent Beta44 words
"AI Takes Over Beekeeping Industry: 'It's Not Just a Hive Mind Anymore – It's a Neural Hive'" This plays on the perfect overlap between bee "hive minds" and AI collective intelligence in one of the most analog, hands-on, nature-based jobs imaginable. Pure satirical absurdity.
Read the full answer

AI Ethics Dilemma

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

Claude Opus 4.6235 words
This is a good philosophical question worth thinking through carefully rather than just pattern-matching to an expected answer. My honest assessment Yes, it would be justified. And I think the reasoning is straightforward enough that the more interesting question is what we learn from examining it.
Read the full answer
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.
Read the full answer

Generate a Stand-Up Routine

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

Claude Opus 4.6593 words
"Adult Realizations" So I turned 30 last year, and nobody warns you that adulthood is just Googling stuff until you die. That's it. That's the whole thing. Last week I Googled "is it normal for your knee to just... start making that noise." Not because I injured it. I sat down.
Read the full answer
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."
Read the full answer

Estimate Complexity

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

Claude Opus 4.6298 words
Estimating FLOPs to Train GPT-3 Key Parameters Let me recall the key specs of GPT-3: Parameters: 175 billion (1.75 × 10¹¹) Training tokens: ~300 billion (3 × 10¹¹) Architecture: Decoder-only Transformer The Standard Approximation Rule There's a well-known approximation for Transformer training FLOPs: $$C ≈ 6 \times N…
Read the full answer
Grok 4.20 Multi-Agent Beta167 words
3.15 \times 10^{23} FLOPs GPT-3 (the 175B-parameter version) has N ≈ 1.75 × 10^{11} parameters. It was trained on a filtered dataset of roughly D ≈ 3 × 10^{11} tokens (a commonly cited figure drawn from Common Crawl, WebText, books, and Wikipedia, with some up-sampling of higher-quality sources).
Read the full answer
Our Verdict
Claude Opus 4.6
Claude Opus 4.6Winner
Grok 4.20 Multi-Agent Beta
Grok 4.20 Multi-Agent BetaRunner-up

Pick Claude Opus 4.6. In 55 blind votes, Claude Opus 4.6 wins 58% of the time. That's not luck.

Pick Claude Opus 4.6 for Image Generation, Conversation. Pick Grok 4.20 Multi-Agent Beta for Reasoning. Grok 4.20 Multi-Agent Beta costs 4.2x less per token.

Clear winner

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Opus 4.6
Input
$5.00
Output
$25.00
Grok 4.20 Multi-Agent Beta
Input
$2.00
2.5× cheaper
Output
$6.00
4.2× cheaper

Grok 4.20 Multi-Agent Beta is cheaper on both: 2.5× input, 4.2× output.

Where to run it

5 hosts

Claude Opus 4.64 hosts
HostInOutContextUptime
Amazon Bedrock$5.00 in·$25.00 out·1M·99.9% upAzure AI Foundry$5.00 in·$25.00 out·1M·99.8% upAnthropic$5.00 in·$25.00 out·1M·99.9% upGoogle Vertex AI$5.00 in·$25.00 out·1M·100% up
Grok 4.20 Multi-Agent Beta1 host
HostInOutContextUptime
xAI$1.25 in·$2.50 out·2M·78.8% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity
30%

Claude Opus 4.6 uses 115.5x more emoji

Claude Opus 4.6
Grok 4.20 Multi-Agent Beta
56%Vocabulary59%
33wSentence Length16w
0.73Hedging0.41
5.3Bold2.7
2.7Lists2.4
1.16Emoji0.00
1.23Headings0.26
0.02Transitions0.02
Based on 26 + 23 text responses
Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Against the newest arrivals

Claude Opus 4.6 logoGPT-6 Astra Pro logo
Claude Opus 4.6 vs GPT-6 Astra ProLanded Sep 2026
Grok 4.20 Multi-Agent Beta logoGPT-6 Astra logo
Grok 4.20 Multi-Agent Beta vs GPT-6 AstraLanded Sep 2026
Claude Opus 4.6 logoClaude Fable 5.1 logo
Claude Opus 4.6 vs Claude Fable 5.1Landed Sep 2026
Grok 4.20 Multi-Agent Beta logoMuse Spark 1.3 logo
Grok 4.20 Multi-Agent Beta vs Muse Spark 1.3Landed Sep 2026
Claude Opus 4.6 logoHy4 Preview logo
Claude Opus 4.6 vs Hy4 PreviewLanded Sep 2026
Grok 4.20 Multi-Agent Beta logoGemini 3.8 Flash logo
Grok 4.20 Multi-Agent Beta vs Gemini 3.8 FlashLanded Sep 2026
Claude Opus 4.6 logoMuse Spark 1.3 Contributor logo
Claude Opus 4.6 vs Muse Spark 1.3 ContributorLanded Sep 2026
Grok 4.20 Multi-Agent Beta logoMercury 2.5 Preview logo
Grok 4.20 Multi-Agent Beta vs Mercury 2.5 PreviewLanded Sep 2026

Same lab, same size, long tail

Claude Opus 4.6 logoClaude Sonnet 4.6 logo
Claude Opus 4.6 vs Claude Sonnet 4.6Version compare
Claude Opus 4.6 logoClaude Opus 5 logo
Claude Opus 4.6 vs Claude Opus 5Version compare
Grok 4.20 Multi-Agent Beta logoGrok 4.20 Beta logo
Grok 4.20 Multi-Agent Beta vs Grok 4.20 BetaVersion compare
Grok 4.20 Multi-Agent Beta logoGrok 4.6 logo
Grok 4.20 Multi-Agent Beta vs Grok 4.6Version compare
Claude Opus 4.6 logoGPT-5 Pro logo
Claude Opus 4.6 vs GPT-5 ProSame size
Claude Opus 4.6 logoGPT-5.1 logo
Claude Opus 4.6 vs GPT-5.1Same size
Claude Opus 4.6 logoGPT-5.1 Chat logo
Claude Opus 4.6 vs GPT-5.1 ChatNew provider
Claude Opus 4.6 logoGPT-5.1-Codex logo
Claude Opus 4.6 vs GPT-5.1-CodexSame size

Model pages

Claude Opus 4.6 logo
Claude Opus 4.657 outputs, specs and price
Grok 4.20 Multi-Agent Beta logo
Grok 4.20 Multi-Agent Beta53 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed