ChatGPT vs Stable Diffusion comparison

ChatGPT and Stable Diffusion compared side by side in AI.

CurrencyUSD KRW EUR

ChatGPT

The most widely used general-purpose AI chatbot. Chat, writing, coding, image generation and web search in one place

A leading open-source image generation model you can install and run on your own computer

Highlighted rows are where they differ.

Item	ChatGPTVisit site	Stable DiffusionVisit site
Starting price	$8+Official USD price	FreeNot applicable
Free tier	Free plan available	Free
Korean support	Good	Average
Main models	GPT-6 (Sol) GPT-6 Luna GPT-6 Pro (Astra) GPT-6.1 Sol Image: ChatGPT Images 2.5	Stable Diffusion 3.5(Large/Medium/Turbo) Stable Image Ultra/Core(API) SDXL Stable Audio 3.0
Type	AI services	AI services
Category	Chatbot/Assistant, Image Generation, Coding	Image Generation, Open Models
Company	OpenAI, United States	Stability AI, United Kingdom
Plans	Free Go $8 Plus $20 Pro $100/$200/$500 Business $25 (annual $20) Enterprise/Edu	Local use free (revenue under $1M) API $0.03 to $0.08 per image Brand Studio $50 Enterprise
Pros	No. 1 in users, so plenty of guides and tips Widest range of features Polished app and voice chat	Free and open source Install it yourself for unlimited generation Very many community models
Cons	Tight usage limits on the free plan Top features need the expensive Pro plans	Hard to install and use Needs a good graphics card

Prices and benefits may change. Check the official site before you pay.

Prices converted at 1 USD = ₩1,325.57 (2026-10-21). Original price shown in brackets. Taxes as listed by each provider.