What is the difference between ChatGPT-4o (March 2025) and Gemini 2.5 Pro Preview 06-05?

ChatGPT-4o (March 2025) is developed by OpenAI while Gemini 2.5 Pro Preview 06-05 is developed by Google AI. ChatGPT-4o (March 2025) has a 128K token context window vs Gemini 2.5 Pro Preview 06-05's 1.0M. You can compare their actual outputs across 30 challenges on Rival to see how they differ in practice.

Which is better, ChatGPT-4o (March 2025) or Gemini 2.5 Pro Preview 06-05?

It depends on your use case. ChatGPT-4o (March 2025) and Gemini 2.5 Pro Preview 06-05 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 30 challenges so you can judge which fits your needs best.

How much does ChatGPT-4o (March 2025) cost compared to Gemini 2.5 Pro Preview 06-05?

ChatGPT-4o (March 2025) costs $5/M input tokens and Gemini 2.5 Pro Preview 06-05 costs $1.25/M input tokens. Gemini 2.5 Pro Preview 06-05 is $3.75/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 ChatGPT-4o (March 2025) and Gemini 2.5 Pro Preview 06-05 on Rival?

This page shows a side-by-side comparison of ChatGPT-4o (March 2025) and Gemini 2.5 Pro Preview 06-05 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 Jun 2025

ChatGPT-4o (March 2025)vsGemini 2.5 Pro Preview 06-05

Gemini 2.5 Pro Preview 06-05 is cheaper than ChatGPT-4o (March 2025) at $1.25/M vs $5/M input tokens.

ChatGPT-4o (March 2025) and Gemini 2.5 Pro Preview 06-05 compared across 30 shared prompts
Spec	ChatGPT-4o (March 2025)	Gemini 2.5 Pro Preview 06-05
Input price	$5/M tokens	$1.25/M tokens
Output price	$15/M tokens	$10/M tokens
Context window	128K tokens	1.0M tokens
Parameters	Not disclosed	Not disclosed
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	Mar 2025	Jun 2025