What is the difference between Gemini 2.5 Flash Preview 05-20 (thinking) and GPT-4.1 Nano?

Gemini 2.5 Flash Preview 05-20 (thinking) is developed by Google AI while GPT-4.1 Nano is developed by OpenAI. Gemini 2.5 Flash Preview 05-20 (thinking) has a 1.0M token context window vs GPT-4.1 Nano's 1.0M. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Flash Preview 05-20 (thinking) or GPT-4.1 Nano?

It depends on your use case. Gemini 2.5 Flash Preview 05-20 (thinking) and GPT-4.1 Nano 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 Gemini 2.5 Flash Preview 05-20 (thinking) cost compared to GPT-4.1 Nano?

Gemini 2.5 Flash Preview 05-20 (thinking) costs $0.15/M input tokens and GPT-4.1 Nano costs $0.1/M input tokens. GPT-4.1 Nano is $0.05/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 05-20 (thinking) and GPT-4.1 Nano on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Flash Preview 05-20 (thinking) and GPT-4.1 Nano 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

Gemini 2.5 Flash Preview 05-20 (thinking)vsGPT-4.1 Nano

GPT-4.1 Nano is cheaper than Gemini 2.5 Flash Preview 05-20 (thinking) at $0.1/M vs $0.15/M input tokens.

Gemini 2.5 Flash Preview 05-20 (thinking) and GPT-4.1 Nano compared across 12 shared prompts
Spec	Gemini 2.5 Flash Preview 05-20 (thinking)	GPT-4.1 Nano
Input price	$0.15/M tokens	$0.1/M tokens
Output price	$3.5/M tokens	$0.4/M tokens
Context window	1.0M tokens	1.0M tokens
Parameters	Not disclosed	Not disclosed
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	May 2025	Apr 2025