OpenAI: GPT-5.2 Pro vs Google: Gemini 3.1 Flash Lite

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 Flash Lite

Description

Gemini 3.1 Flash Lite is Google’s GA high-efficiency multimodal model optimized for low-latency, high-volume workloads. It supports text, image, video, audio, and PDF inputs, and is designed for lightweight agentic...

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 Flash Lite
Provider	OpenRouter	OpenRouter
Context Length	`400,000 tokens`	`1,048,576 tokens`
Input Price	`$21.00/M`	`$0.250/M`
Output Price	`$168.00/M`	`$1.50/M`
Vision Support	Yes	Yes
Higher cost	Yes	No
Capabilities	TextVision	TextVisionFast