What is the difference between Gemini 2.5 Flash Preview (thinking) and GPT-5?

Gemini 2.5 Flash Preview (thinking) is developed by Google AI while GPT-5 is developed by OpenAI. Gemini 2.5 Flash Preview (thinking) has a 1.0M token context window vs GPT-5's 400K. You can compare their actual outputs across 20 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Flash Preview (thinking) or GPT-5?

It depends on your use case. Gemini 2.5 Flash Preview (thinking) and GPT-5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 20 challenges so you can judge which fits your needs best.

How much does Gemini 2.5 Flash Preview (thinking) cost compared to GPT-5?

Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens and GPT-5 costs $1.25/M input tokens. Gemini 2.5 Flash Preview (thinking) is $1.07/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 Gemini 2.5 Flash Preview (thinking) and GPT-5 on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Flash Preview (thinking) and GPT-5 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 Aug 2025

Gemini 2.5 Flash Preview (thinking)vsGPT-5

Gemini 2.5 Flash Preview (thinking) is cheaper than GPT-5 at $0.175/M vs $1.25/M input tokens.

Gemini 2.5 Flash Preview (thinking) and GPT-5 compared across 20 shared prompts
Spec	Gemini 2.5 Flash Preview (thinking)	GPT-5
Input price	$0.175/M tokens	$1.25/M tokens
Output price	$3.5/M tokens	$10/M tokens
Context window	1.0M tokens	400K tokens
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	Apr 2025	Aug 2025