What is the difference between Gemini 2.5 Pro Preview 06-05 and GPT-5.1?

Gemini 2.5 Pro Preview 06-05 is developed by Google AI while GPT-5.1 is developed by OpenAI. Gemini 2.5 Pro Preview 06-05 has a 1.0M token context window vs GPT-5.1's 400K. in 21 community votes on Rival, Gemini 2.5 Pro Preview 06-05 wins 53% of head-to-head matchups. These results are based on blind head-to-head voting across 42 challenges.

Which is better, Gemini 2.5 Pro Preview 06-05 or GPT-5.1?

Based on 21 community votes on Rival, Gemini 2.5 Pro Preview 06-05 wins 53% of head-to-head matchups against GPT-5.1. Gemini 2.5 Pro Preview 06-05 is strongest in Conversation, Image Generation. However, GPT-5.1 leads in Web Design, Reasoning.

How much does Gemini 2.5 Pro Preview 06-05 cost compared to GPT-5.1?

Gemini 2.5 Pro Preview 06-05 costs $1.25/M input tokens and GPT-5.1 costs $1.25/M input tokens. GPT-5.1 is $0.00/M cheaper per input. The more expensive model wins 53% of duels, so the premium may be justified by quality.

How are Gemini 2.5 Pro Preview 06-05 vs GPT-5.1 votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 21 votes have been collected for this pair across 42 challenges. All vote data is part of Rival's open dataset.

Updated Nov 2025

Gemini 2.5 Pro Preview 06-05vsGPT-5.1

Gemini 2.5 Pro Preview 06-05 wins 53% of 21 blind community votes against GPT-5.1 on Rival.

Gemini 2.5 Pro Preview 06-05 and GPT-5.1 compared across 42 shared prompts
Spec	Gemini 2.5 Pro Preview 06-05	GPT-5.1
Win rate	53%	47%
Input price	$1.25/M tokens	$1.25/M tokens
Output price	$10/M tokens	$10/M tokens
Context window	1.0M tokens	400K tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Jun 2025	Nov 2025
SWE-bench Verified	67.2%	76.3%