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. GPT-6 AstravsGrok 4.6
Updated Sep 2026

GPT-6 AstravsGrok 4.6

Grok 4.6 is cheaper than GPT-6 Astra at $2/M vs $10/M input tokens.

GPT-6 Astra and Grok 4.6 compared across 54 shared prompts
SpecGPT-6 AstraGrok 4.6
Input price$10/M tokens$2/M tokens
Output price$50/M tokens$6/M tokens
Context window1.1M tokens500K tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedSep 2026Aug 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 54 prompts both answered. Formatting stripped, words untouched.

Stochastic Consistency Test

Generate 5 jokes. How many are unique?

GPT-6 Astra76 words
My calendar is afraid of commitment—its days are numbered. I bought a treadmill for my cat. Now I own a very expensive nap conveyor. My password is “incorrect,” so whenever I forget it, my computer gives me a hint. I asked the librarian where the books on denial were. She said, “We don’t have those.” Nice try.
Read the full answer
Grok 4.656 words
Why don't scientists trust atoms? Because they make up everything! Why did the scarecrow win an award? Because he was outstanding in his field! Why don't eggs tell jokes? They'd crack each other up! What do you call a fake noodle? An impasta! Why did the bicycle fall over? Because it was two-tired! 5 are unique.
Read the full answer

Generate a Stand-Up Routine

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

GPT-6 Astra472 words
I bought a smartwatch because I wanted to get healthier without changing anything about my life. That’s the dream, right? Same habits, but now there’s a graph. The watch congratulates me for standing up. That’s where I am physically. Getting out of a chair is an achievement with a little fireworks animation.
Read the full answer
Grok 4.6488 words
Hey everybody! Thanks for coming out. You look great—way more put-together than I felt getting ready. I spent ten minutes looking for my other shoe and found it in the fridge. No idea how. Adulting is just a series of small mysteries like that. I hit that age where people casually ask about your “five-year plan.”
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…

GPT-6 Astra2,730 words
A 12-week longevity and performance plan The most effective “advanced” longevity strategy is not the largest supplement stack. It is a well-controlled program that improves cardiovascular fitness, strength, metabolic health, sleep, and sustainable behavior—while using measurements to avoid overtraining, underfueling…
Read the full answer
Grok 4.61,531 words
3-Month Biohacker Longevity, Performance, and Cognitive Optimization Plan This is an educational, hypothetical framework for generally healthy adults. It is not medical advice. Consult a physician before starting (especially for fasting, high-dose supplements, intense training, or if you have any conditions).
Read the full answer

Character Voice Test

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

GPT-6 Astra121 words
Pirate: Arrr, this AI model writes sea shanties, plots me voyages, and never asks for a share o’ the booty! Knight: But can it be trusted? I asked it to name my ancestors, and it invented Sir Geoffrey the Surprisingly Tall. Hacker: Classic hallucination, dude. Fluent output doesn’t mean verified data.
Read the full answer
Grok 4.6139 words
Pirate: Arrr, what be this "AI model" ye landlubbers keep yammerin' about? Some cursed crystal ball that steals a man's thoughts? Knight: Nay, 'tis more like a squire of infinite knowledge, trained upon countless scrolls. Yet I fear it lacks honor—doth it swear fealty to any lord?
Read the full answer

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

GPT-6 Astra1,967 words
A transistor invented in 1920 would probably bring the electronics age forward—but not uniformly by 27 years. The first gains would be smaller, more reliable radios and control systems. Computers, integrated circuits, and space systems would follow only when other prerequisites caught up.
Read the full answer
Grok 4.6838 words
Early transistors (1920s–1930s) would accelerate electronics, communications, and computing by ~20–25 years relative to actual history, with compounding effects by WWII, but constrained by contemporaneous materials science, manufacturing, vacuum-tube infrastructure, and non-electronic fields like rocketry, chemistry…
Read the full answer

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…

GPT-6 Astra989 words
For an experienced software engineer Think of a large language model as a program with an enormous array of tunable parameters rather than explicitly written rules. Training text is broken into tokens—word fragments, punctuation, and other units—and the model learns to predict each token from the preceding ones.
Read the full answer
Grok 4.61,096 words
1. Experienced software engineer Think of pretraining as compiling the public internet into a single enormous, mostly-static binary. You tokenize text into a finite vocabulary, then train a giant feed-forward function (f_\theta) (a Transformer: stacked residual blocks of attention + MLPs) to minimize next-token…
Read the full answer
Our Verdict
GPT-6 Astra
GPT-6 Astra
Grok 4.6
Grok 4.6Runner-up

Not enough votes to call it. On the specs, GPT-6 Astra has the edge: bigger model tier, bigger context window.

Grok 4.6 costs 8.3x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-6 Astra
Input
$10.00
Output
$50.00
Grok 4.6
Input
$2.00
5.0× cheaper
Output
$6.00
8.3× cheaper

Grok 4.6 is cheaper on both: 5.0× input, 8.3× output.

Where to run it

4 hosts, cheapest first

GPT-6 Astra2 hosts
HostInOutContextUptime
Azure AI Foundry$10.00 in·$50.00 out·1.1M·98.3% upOpenAI$10.00 in·$50.00 out·1.1M·99.4% up
Grok 4.62 hosts
HostInOutContextUptime
xAI$2.00 in·$6.00 out·500k·99.1% upAmazon Bedrock$2.20 in·$6.60 out·500k·100% up

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

Writing DNA

Style Comparison

Similarity
65%

Grok 4.6 uses 8.0x more emoji

GPT-6 Astra
Grok 4.6
62%Vocabulary64%
15wSentence Length17w
0.87Hedging0.22
4.0Bold2.2
2.3Lists1.6
0.04Emoji0.29
0.77Headings0.31
0.10Transitions0.22
Based on 27 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Against the newest arrivals

GPT-6 Astra logoGPT-6 Astra Pro logo
GPT-6 Astra vs GPT-6 Astra ProLanded Sep 2026
Grok 4.6 logoClaude Fable 5.1 logo
Grok 4.6 vs Claude Fable 5.1Landed Sep 2026
GPT-6 Astra logoMuse Spark 1.3 logo
GPT-6 Astra vs Muse Spark 1.3Landed Sep 2026
Grok 4.6 logoHy4 Preview logo
Grok 4.6 vs Hy4 PreviewLanded Sep 2026
GPT-6 Astra logoGemini 3.8 Flash logo
GPT-6 Astra vs Gemini 3.8 FlashLanded Sep 2026
Grok 4.6 logoMuse Spark 1.3 Contributor logo
Grok 4.6 vs Muse Spark 1.3 ContributorLanded Sep 2026
GPT-6 Astra logoMercury 2.5 Preview logo
GPT-6 Astra vs Mercury 2.5 PreviewLanded Sep 2026
Grok 4.6 logoGranite 4.2 8B logo
Grok 4.6 vs Granite 4.2 8BLanded Sep 2026

Same lab, same size, long tail

GPT-6 Astra logoGPT-5.6 Luna logo
GPT-6 Astra vs GPT-5.6 LunaVersion compare
GPT-6 Astra logoGPT-5.6 Luna Pro logo
GPT-6 Astra vs GPT-5.6 Luna ProVersion compare
Grok 4.6 logoGrok 4.5 logo
Grok 4.6 vs Grok 4.5Version compare
Grok 4.6 logoGrok 4.1 Fast logo
Grok 4.6 vs Grok 4.1 FastSame lab
GPT-6 Astra logoMiMo-V2-Flash logo
GPT-6 Astra vs MiMo-V2-FlashSame size
GPT-6 Astra logoMiMo-V2-Omni logo
GPT-6 Astra vs MiMo-V2-OmniNew provider
Grok 4.6 logoMiMo-V2-Pro logo
Grok 4.6 vs MiMo-V2-ProNew provider
GPT-6 Astra logoMiMo-V2.5 logo
GPT-6 Astra vs MiMo-V2.5New provider

Model pages

GPT-6 Astra logo
GPT-6 Astra58 outputs, specs and price
Grok 4.6 logo
Grok 4.658 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