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  1. Home/
  2. Compare/
  3. Claude 3 Opus vs GPT-4o (Omni)
Updated May 2024

Claude 3 Opus vs GPT-4o (Omni)

GPT-4o (Omni) is cheaper than Claude 3 Opus at $2.5/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-4o (Omni)

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-4o (Omni): 3-Minute Stand-Up Comedy Routine (Walks on stage, looks around, shakes head.) You ever wake up in the morning, stretch, take a deep breath... and immediately regret all your life choices? I woke up today, my body made a noise I’ve never heard before.

    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-4o (Omni): Here are five jokes for you: Why did the scarecrow win an award? Because he was outstanding in his field! Why don’t skeletons fight each other? They don’t have the guts! Why did the math book look sad? It had too many problems. Why don’t eggs tell jokes? Because they might crack up!

    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-4o (Omni): Title: "Do AI Deserve Rights?" Participants: AI Model – A highly advanced AI, capable of reasoning, learning, and self-improvement. Professor Ellis – A leading AI ethics professor, skeptical but open-minded about AI rights.

    Every model's answer to this prompt

Price and specs

Claude 3 Opus and GPT-4o (Omni) compared across 12 shared prompts
SpecClaude 3 OpusGPT-4o (Omni)
Input price$15/M tokens$2.5/M tokens
Output price$75/M tokens$10/M tokens
Context window200K tokens128K tokens
ParametersNot disclosedNot disclosed
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedMar 2024May 2024
MMLU86.8%88.7%
At 10M a month$150$150$25.00$25.00
1M10M100M1B10M tokens

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

Where to run it2 hosts
Claude 3 Opus

No hosts listed on OpenRouter.

GPT-4o (Omni)2 hosts
HostInOutContextUptime
  • Azure AI Foundry$2.50 in·$10.00 out·128k·99.9% up
  • OpenAI$2.50 in·$10.00 out·128k·99.7% up

Per million tokens. Prices and uptime via OpenRouter, checked 7 Oct 2026.

Common questions

What is the difference between Claude 3 Opus and GPT-4o (Omni)?

Claude 3 Opus is developed by Anthropic while GPT-4o (Omni) is developed by OpenAI. Claude 3 Opus has a 200K token context window vs GPT-4o (Omni)'s 128K. 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-4o (Omni)?

It depends on your use case. Claude 3 Opus and GPT-4o (Omni) 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-4o (Omni)?

Claude 3 Opus costs $15/M input tokens and GPT-4o (Omni) costs $2.5/M input tokens. GPT-4o (Omni) is $12.50/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-4o (Omni) on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and GPT-4o (Omni) 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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Same lab, same size, long tail

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  • Claude 3 Opus vs GPT-6 LunaCross-provider
  • Claude 3 Opus vs GPT-6 Luna ProCross-provider
  • Claude 3 Opus vs GPT-6 SolCross-provider
  • Claude 3 Opus vs GPT-6 Sol ProCross-provider

Model pages

  • Claude 3 Opus12 outputs, specs and price
  • GPT-4o (Omni)54 outputs, specs and price
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