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

Claude Sonnet 4 is developed by Anthropic while GPT-4o (Omni) is developed by OpenAI. Claude Sonnet 4 has a 200K token context window vs GPT-4o (Omni)'s 128K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4 or GPT-4o (Omni)?

It depends on your use case. Claude Sonnet 4 and GPT-4o (Omni) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 4 cost compared to GPT-4o (Omni)?

Claude Sonnet 4 costs $3/M input tokens and GPT-4o (Omni) costs $2.5/M input tokens. GPT-4o (Omni) is $0.50/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 Sonnet 4 and GPT-4o (Omni) on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4 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.

Updated May 2025

Claude Sonnet 4vsGPT-4o (Omni)

GPT-4o (Omni) is cheaper than Claude Sonnet 4 at $2.5/M vs $3/M input tokens.

Claude Sonnet 4 and GPT-4o (Omni) compared across 54 shared prompts
Spec	Claude Sonnet 4	GPT-4o (Omni)
Input price	$3/M tokens	$2.5/M tokens
Output price	$15/M tokens	$10/M tokens
Context window	200K tokens	128K tokens
Parameters	Not disclosed	Not disclosed
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	May 2025	May 2024