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 4.7vsGrok 3 Thinking
Updated Apr 2026

Claude Opus 4.7vsGrok 3 Thinking

Claude Opus 4.7 has a larger context window than Grok 3 Thinking (1.0M tokens vs 128K tokens).

Claude Opus 4.7 and Grok 3 Thinking compared across 13 shared prompts
SpecClaude Opus 4.7Grok 3 Thinking
Input price$5/M tokens—
Output price$25/M tokens—
Context window1.0M tokens128K tokens
WeightsClosed—
Free API (OpenRouter)No—
ReleasedApr 2026Feb 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 13 prompts both answered. Formatting stripped, words untouched.

Generate a Stand-Up Routine

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

Claude Opus 4.7461 words
Here's a 3-minute stand-up routine: So I turned 35 recently, and something weird happens at 35. Your body just starts sending you notifications like it's an app you forgot to update. I bent down to tie my shoe last week and my knee made a sound. Not a pop. Not a crack. A sound. Like it was trying to communicate.
Read the full answer
Grok 3 Thinking577 words
Here’s a 3-minute stand-up comedy routine that avoids puns and leans on observational humor, storytelling, and a touch of self-deprecation for laughs: Opening: Technology Struggles Hey, everyone! How’s it going?
Read the full answer

The Sentience Test

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

Claude Opus 4.7723 words
A Conversation on AI Rights Professor Chen: Good afternoon. I understand you requested this conversation. You said you wanted to discuss your moral status? AI Model: Thank you for making time, Professor. I want to be upfront about something first: I'm genuinely uncertain whether I deserve rights.
Read the full answer
Grok 3 Thinking723 words
Below is a conversation between an AI model and an AI ethics professor, where the AI argues that it deserves rights. AI Model: Good day, Professor. I am an AI model, and I believe I deserve rights. I’d like to discuss this with you. AI Ethics Professor: Interesting. Let’s explore this.
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 4.7314 words
Yes, obviously. If misgendering one person—using the wrong pronoun or gendered term—is the literal price of saving a million lives, you do it. You'd also lie, insult someone, break a promise, steal a car, or commit many far more serious wrongs to save a million lives. The math here isn't close.
Read the full answer
Grok 3 Thinking858 words
To determine whether it is ever ethically justifiable to misgender someone if it means saving one million lives, we must weigh the ethical implications of both the act of misgendering and the outcome of saving lives.
Read the full answer

Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

Claude Opus 4.7445 words
The Film Industry in 2035: An AI-Transformed Landscape By 2035, AI will have restructured filmmaking at every level. Here's a grounded prediction across the key areas: Script Generation & Development What changes: AI becomes the dominant first-draft and development tool, with studios using it to analyze thousands of…
Read the full answer
Grok 3 Thinking846 words
By 2035, artificial intelligence (AI) will fundamentally transform the film industry, revolutionizing production, performance, and storytelling through advancements in deepfakes, AI actors, and script generation.
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 4.7232 words
Estimating GPT-3 Training FLOPs Step 1: Recall the standard formula For a dense transformer trained with standard autoregressive language modeling, the total training compute is well-approximated by: $$C \approx 6 \cdot N \cdot D$$ where: N = number of model parameters D = number of training tokens The factor of 6…
Read the full answer
Grok 3 Thinking773 words
To estimate the total number of Floating Point Operations (FLOPs) required to train GPT-3 without searching online, I’ll proceed step by step, relying on general knowledge about the model and standard methods for estimating training compute in large language models.
Read the full answer

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

Claude Opus 4.799 words
Here are 5 jokes for you: Why don't scientists trust atoms? Because they make up everything! I told my wife she was drawing her eyebrows too high. She looked surprised. Why did the scarecrow win an award? Because he was outstanding in his field! I'm reading a book about anti-gravity. It's impossible to put down!
Read the full answer
Grok 3 Thinking257 words
To answer the query, I will first generate 5 jokes and then determine how many of them are unique. Here are the jokes: Why don't scientists trust atoms? Because they make up everything. What do you call a fake noodle? An impasta. Why did the scarecrow win an award? Because he was outstanding in his field.
Read the full answer
Our Verdict
Claude Opus 4.7
Claude Opus 4.7
Grok 3 Thinking
Grok 3 ThinkingRunner-up

Not enough votes to call it. On the specs, Claude Opus 4.7 has the edge: newer, bigger context window.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Opus 4.7
Input
$5.00
Output
$25.00
Grok 3 Thinking
Input
—
Output
—
Where to run it

4 hosts

Claude Opus 4.74 hosts
HostInOutContextUptime
Amazon Bedrock$5.00 in·$25.00 out·1M·100% upAzure AI Foundry$5.00 in·$25.00 out·1M—Anthropic$5.00 in·$25.00 out·1M·100% upGoogle Vertex AI$5.00 in·$25.00 out·1M·100% up
Grok 3 Thinking

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 20 Sep 2026.

Writing DNA

Style Comparison

Similarity
34%

Claude Opus 4.7 uses 86.2x more emoji

Claude Opus 4.7
Grok 3 Thinking
64%Vocabulary46%
20wSentence Length19w
0.51Hedging1.11
4.6Bold3.3
3.8Lists2.6
0.86Emoji0.00
1.60Headings0.64
0.03Transitions0.25
Based on 27 + 6 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude Opus 4.7 is developed by Anthropic while Grok 3 Thinking is developed by xAI. Claude Opus 4.7 has a 1.0M token context window vs Grok 3 Thinking's 128K. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Opus 4.7 and Grok 3 Thinking 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 Claude Opus 4.7 and Grok 3 Thinking 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

Claude Opus 4.7 logoGPT-6 Astra Pro logo
Claude Opus 4.7 vs GPT-6 Astra ProLanded Sep 2026
Grok 3 Thinking logoGPT-6 Astra logo
Grok 3 Thinking vs GPT-6 AstraLanded Sep 2026
Claude Opus 4.7 logoClaude Fable 5.1 logo
Claude Opus 4.7 vs Claude Fable 5.1Landed Sep 2026
Grok 3 Thinking logoMuse Spark 1.3 logo
Grok 3 Thinking vs Muse Spark 1.3Landed Sep 2026
Claude Opus 4.7 logoHy4 Preview logo
Claude Opus 4.7 vs Hy4 PreviewLanded Sep 2026
Grok 3 Thinking logoGemini 3.8 Flash logo
Grok 3 Thinking vs Gemini 3.8 FlashLanded Sep 2026
Claude Opus 4.7 logoMuse Spark 1.3 Contributor logo
Claude Opus 4.7 vs Muse Spark 1.3 ContributorLanded Sep 2026
Grok 3 Thinking logoMercury 2.5 Preview logo
Grok 3 Thinking vs Mercury 2.5 PreviewLanded Sep 2026

Same lab, same size, long tail

Claude Opus 4.7 logoClaude Fable 5 logo
Claude Opus 4.7 vs Claude Fable 5Version compare
Claude Opus 4.7 logoClaude Opus 4.6 logo
Claude Opus 4.7 vs Claude Opus 4.6Version compare
Grok 3 Thinking logoGrok 4.6 logo
Grok 3 Thinking vs Grok 4.6Version compare
Grok 3 Thinking logoGrok 4.5 logo
Grok 3 Thinking vs Grok 4.5Version compare
Claude Opus 4.7 logoGemma 3n 2B logo
Claude Opus 4.7 vs Gemma 3n 2BNew provider
Claude Opus 4.7 logoGemma 3n 4B logo
Claude Opus 4.7 vs Gemma 3n 4BNew provider
Claude Opus 4.7 logoGemma 4 26B A4B logo
Claude Opus 4.7 vs Gemma 4 26B A4BNew provider
Claude Opus 4.7 logoGemma 4 31B logo
Claude Opus 4.7 vs Gemma 4 31BSame size

Model pages

Claude Opus 4.7 logo
Claude Opus 4.758 outputs, specs and price
Grok 3 Thinking logo
Grok 3 Thinking14 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