What is the difference between Gemini 3.1 Pro Preview and GPT-5?

Gemini 3.1 Pro Preview is developed by Google AI while GPT-5 is developed by OpenAI. Gemini 3.1 Pro Preview has a 1.0M token context window vs GPT-5's 400K. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, Gemini 3.1 Pro Preview or GPT-5?

It depends on your use case. Gemini 3.1 Pro Preview and GPT-5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 51 challenges so you can judge which fits your needs best.

How much does Gemini 3.1 Pro Preview cost compared to GPT-5?

Gemini 3.1 Pro Preview costs $2/M input tokens and GPT-5 costs $1.25/M input tokens. GPT-5 is $0.75/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 Gemini 3.1 Pro Preview and GPT-5 on Rival?

This page shows a side-by-side comparison of Gemini 3.1 Pro Preview 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 Feb 2026

Gemini 3.1 Pro PreviewvsGPT-5

GPT-5 is cheaper than Gemini 3.1 Pro Preview at $1.25/M vs $2/M input tokens.

Gemini 3.1 Pro Preview and GPT-5 compared across 51 shared prompts
Spec	Gemini 3.1 Pro Preview	GPT-5
Input price	$2/M tokens	$1.25/M tokens
Output price	$12/M tokens	$10/M tokens
Context window	1.0M tokens	400K tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Feb 2026	Aug 2025
SWE-bench Verified	80.6%	74.9%