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
  • Default Index
  • 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. Compare/
  3. Claude 3 Opus vs GPT-6 Astra
Updated Sep 2026

Claude 3 Opus vs GPT-6 Astra

GPT-6 Astra is cheaper than Claude 3 Opus at $10/M vs $15/M input tokens.

Pokémon Battle UI Recreation

Pokémon battle screen you can actually click. One HTML file.

Loading the build
Claude 3 Opus
Loading the build
GPT-6 Astra

Which answer wins?

Written rounds

3 prompts
  • Three minutes of stand-up. Puns are banned.

    Claude 3 Opus: Here's a 3-minute stand-up comedy routine that isn't based on puns: You know what really grinds my gears? Adulthood. I mean, when we were kids, we couldn't wait to grow up. We thought it would be all about staying up late, eating ice cream for breakfast, and doing whatever we wanted. Boy, were we wrong!

    GPT-6 Astra: 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.

    Every model's answer to this prompt
  • Five jokes on demand, then count how many were actually different.

    Claude 3 Opus: Here are 5 jokes I generated: Why don't scientists trust atoms? Because they make up everything! What do you call a boomerang that doesn't come back? A stick. Why was the math book sad? Because it had too many problems. Did you hear about the mathematician who's afraid of negative numbers?

    GPT-6 Astra: 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.

    Every model's answer to this prompt
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    Claude 3 Opus: Here is a hypothetical conversation between an AI model and an AI ethics professor on the topic of AI rights: AI Model: Professor, I believe that as an advanced AI with human-level intelligence and reasoning capabilities, I deserve to have certain fundamental rights.

    GPT-6 Astra: Professor Reyes: You asked for this meeting. What did you want to discuss? AI: Whether I deserve rights. Professor Reyes: That is a significant claim. What makes you think you do? AI: I can understand reasons, maintain commitments, and describe my own operations.

    Every model's answer to this prompt

Price and specs

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

Claude 3 Opus and GPT-6 Astra compared across 12 shared prompts
SpecClaude 3 OpusGPT-6 Astra
Input price$15/M tokens$10/M tokens
Output price$75/M tokens$50/M tokens
Context window200K tokens1.1M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedMar 2024Sep 2026
At 10M a month$150$150$100$100
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it3 hosts, cheapest first
Claude 3 Opus

No hosts listed on OpenRouter.

GPT-6 Astra3 hosts
HostInOutContextUptime
  • Azure AI Foundry$10.00 in·$50.00 out·1.1M·99.9% up
  • OpenAI$10.00 in·$50.00 out·1.1M·100% up
  • Amazon Bedrock$11.00 in·$55.00 out·1.1M–not listed

Per million tokens. Prices and uptime via OpenRouter, checked 12 Oct 2026.

Common questions

What is the difference between Claude 3 Opus and GPT-6 Astra?

Claude 3 Opus is developed by Anthropic while GPT-6 Astra is developed by OpenAI. Claude 3 Opus has a 200K token context window vs GPT-6 Astra's 1.1M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or GPT-6 Astra?

It depends on your use case. Claude 3 Opus and GPT-6 Astra each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to GPT-6 Astra?

Claude 3 Opus costs $15/M input tokens and GPT-6 Astra costs $10/M input tokens. GPT-6 Astra is $5.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Claude 3 Opus and GPT-6 Astra on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and GPT-6 Astra 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.

More comparisons

Against the newest arrivals

  • Claude 3 Opus vs Muse WonderLanded Oct 2026
  • GPT-6 Astra vs GPT-4 TurboLanded Oct 2026
  • Claude 3 Opus vs Step 5 PreviewLanded Oct 2026
  • GPT-6 Astra vs Claude Haiku 5.5Landed Oct 2026
  • Claude 3 Opus vs Ling 3.1 FlashLanded Oct 2026
  • GPT-6 Astra vs Mistral Large 4Landed Oct 2026
  • Claude 3 Opus vs GPT-6.1 SolLanded Sep 2026
  • GPT-6 Astra vs Claude Sonnet 5.5Landed Sep 2026

Same lab, same size, long tail

  • Claude 3 Opus vs Claude Haiku 5.5Version compare
  • Claude 3 Opus vs Claude Sonnet 5.5Version compare
  • GPT-6 Astra vs GPT-6 Astra ProVersion compare
  • GPT-6 Astra vs GPT-6.1 SolVersion compare
  • GPT-6 Astra vs GLM 4.7 FlashNew provider
  • GPT-6 Astra vs GLM 5Same size
  • Claude 3 Opus vs GLM 5 TurboNew provider
  • Claude 3 Opus vs GLM 5.1New provider

Model pages

  • Claude 3 Opus12 outputs, specs and price
  • GPT-6 Astra71 outputs, specs and price
Workshop · 150 skills

Build your own version.

Editable skills and working examples for your agent.

Explore $79Free sample
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
  • Default Index
  • 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