What is the difference between Gemini 2.5 Pro Preview 06-05 and GPT-5 Codex?

Gemini 2.5 Pro Preview 06-05 is developed by Google AI while GPT-5 Codex is developed by OpenAI. You can compare their actual outputs across 40 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Pro Preview 06-05 or GPT-5 Codex?

It depends on your use case. Gemini 2.5 Pro Preview 06-05 and GPT-5 Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 40 challenges so you can judge which fits your needs best.

How can I compare Gemini 2.5 Pro Preview 06-05 and GPT-5 Codex on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Pro Preview 06-05 and GPT-5 Codex 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 Sep 2025

Gemini 2.5 Pro Preview 06-05vsGPT-5 Codex

GPT-5 Codex is the newer model, released after Gemini 2.5 Pro Preview 06-05.

Gemini 2.5 Pro Preview 06-05 and GPT-5 Codex compared across 40 shared prompts
Spec	Gemini 2.5 Pro Preview 06-05	GPT-5 Codex
Input price	$1.25/M tokens	—
Output price	$10/M tokens	—
Context window	1.0M tokens	—
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Jun 2025	Sep 2025
SWE-bench Verified	67.2%	74.5%