ChatGPT

ChatGPT is a large language model-based conversational AI assistant developed by OpenAI, built on the GPT series of models and officially launched in November 2022. It understands and generates natural language, supports multi-turn contextual conversations, and is widely used for writing assistance, code generation, data analysis, translation, and Q&A. ChatGPT offers both a free tier and paid subscriptions, with paid plans unlocking more powerful models (GPT-4o, o1, o3) and advanced features like image generation, web browsing, and file analysis. It has become one of the most widely used AI assistants globally.

Core Features

• Multi-turn Conversation: Supports long-context continuous dialogue, maintaining conversation history and contextual consistency
• Code Generation & Debugging: Supports dozens of programming languages for generating, explaining, optimizing, and debugging code
• Image Generation (Plus/Pro): Integrated DALL·E 3 for generating high-quality images from text descriptions
• Web Search: Real-time internet search for up-to-date information (paid feature)
• File & Image Analysis: Upload PDFs, Word docs, Excel files, and images for content analysis
• Voice Mode: Voice input/output with near-human real-time voice interaction
• Custom GPTs: Create personalized GPT assistants with custom instructions, knowledge bases, and tools
• Canvas Collaborative Editing: Built-in document/code editor for co-creation and revision with AI
• Data Analysis: Execute Python code for data processing, visualization, and statistical analysis
• Multilingual Support: Understands and generates dozens of languages including English and Chinese

How to Use

Web Version

1. Visit chat.openai.com to register or log in
2. Type your question or instruction in the input box at the bottom and press Enter
3. ChatGPT streams its response in real time; continue the conversation or ask for revisions

Mobile App

• Download the official iOS or Android app and log in
• Supports voice input — tap the microphone icon to start a voice conversation

Desktop App

• macOS users can download the official desktop app, supporting screenshot analysis and keyboard shortcut activation

Usage Tips

• Role Assignment: Tell ChatGPT to play a specific role at the start (e.g., "You are a senior Python engineer")
• Step-by-step Prompting: Break complex tasks into multiple steps
• File Upload: Drag and drop files directly into the chat for analysis
• Use GPTs: Explore specialized GPT assistants in the GPT Store

Key Advantages

• Powerful Models: GPT-4o, o1, o3 lead benchmarks in reasoning, coding, and mathematics
• All-in-One: Combines conversation, image generation, code execution, web search, and file analysis
• Rich Ecosystem: GPT Store hosts millions of custom GPTs covering diverse vertical use cases
• Cross-Platform: Available on Web, iOS, Android, and macOS desktop
• Open API: Full API access for developers to integrate into their own applications
• Continuous Updates: OpenAI frequently releases model and feature updates to maintain industry leadership
• Free to Start: Core features are completely free, lowering the barrier to entry

Pricing

Consumer Subscription Plans

Plan	Price	Key Benefits
Free	$0/month	Limited GPT-4o access, basic features
Plus	$20/month	Unlimited GPT-4o, o1/o3 models, image generation, file analysis, web search
Pro	$200/month	Unlimited access to all models, o1 Pro mode, higher priority
Team	$25/user/month	Team collaboration, admin console, data not used for training
Enterprise	Custom pricing	Enterprise security, SSO, longer context, dedicated support

API Pricing (per token)

Model	Input	Output
GPT-5.2	$1.75 / 1M tokens	$14.00 / 1M tokens
GPT-5 mini	$0.25 / 1M tokens	$2.00 / 1M tokens
GPT-4.1 (fine-tuning)	$3.00 / 1M tokens	$12.00 / 1M tokens

Use the Batch API to save 50% on costs

Get Help

• Help Center: help.openai.com — FAQs, usage guides, account management
• Official Docs: platform.openai.com/docs — API documentation, developer guides
• Community Forum: community.openai.com — user discussions and Q&A
• Status Page: status.openai.com — real-time service status
• Customer Support: Click the "?" icon after logging in to submit a ticket (Plus/Pro users get priority)
• Twitter/X: @OpenAI — official announcements and updates

Download

• iOS App: Search "ChatGPT" on the App Store — supports iPhone and iPad
• Android App: Search "ChatGPT" on Google Play — supports Android phones and tablets
• macOS Desktop: openai.com/chatgpt/download/ — supports screenshot analysis, Option+Space shortcut
• Windows Desktop: Windows version available for download from the official website
• Web: No installation needed — visit chat.openai.com directly

Additional Information

• Launch Date: Officially launched November 30, 2022; reached 1 million users in 5 days
• Developer: OpenAI (headquartered in San Francisco, USA)
• Data Privacy: Disable chat history in settings, or opt out of model training via the privacy portal
• Content Policy: Prohibits illegal, harmful, or discriminatory content; built-in safety filters
• Context Length: GPT-4o supports up to 128K token context window
• Model Selection: Users can manually switch between GPT-4o, o1, o3, and other models