OpenAI: GPT-5.2 Pro vs Google: Gemini 3.1 Pro Preview

Compare these two models side-by-side to help you make the best choice for your needs

OpenAI: GPT-5.2 Pro

Premium

Description

GPT-5.2 Pro is OpenAI’s most advanced model, offering major improvements in agentic coding and long context performance over GPT-5 Pro. It is optimized for complex tasks that require step-by-step reasoning,...

Strengths

•Multimodal understanding with text and image support
•Large context window (400k tokens)

Best For

Image and document understanding

Google: Gemini 3.1 Pro Preview

Premium

Description

Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...

Strengths

•Multimodal understanding with text and image support
•Large context window (1049k tokens)

Best For

Image and document understanding

Feature	OpenAI: GPT-5.2 Pro	Google: Gemini 3.1 Pro Preview
Provider	OpenRouter	OpenRouter
Context Length	`400,000 tokens`	`1,048,576 tokens`
Input Price	`$21.00/M`	`$2.00/M`
Output Price	`$168.00/M`	`$12.00/M`
Vision Support	Yes	Yes
Higher cost	Yes	Yes
Capabilities	TextVision	TextVision