ChatGPT — AI Chat by OpenAI
ChatGPT — AI Chat by OpenAI
Section titled “ChatGPT — AI Chat by OpenAI”ChatGPT is the AI chat assistant built by OpenAI, and is one of the most widely used AI tools in the world. Available at chat.openai.com, it is powered by OpenAI’s current GPT-5.6 model family and supports text, images, voice, file uploads, and a vast ecosystem of plugins and custom GPTs.
Current Models
Section titled “Current Models”GPT-5.6 (July 2026) replaced GPT-5.5 as OpenAI’s frontier tier, shipping as three named variants instead of one model. See the OpenAI Models guide for full details.
| Model | Notes |
|---|---|
| GPT-5.6 Sol | Maximum reasoning — the model Plus unlocks by default |
| GPT-5.6 Terra | Capable, lower-cost option |
| GPT-5.6 Luna | Fastest and most cost-efficient |
| o1 / o1-pro | Reasoning model — slow, deliberate, exceptional at maths and logic |
| o3 / o4-mini | Earlier dedicated reasoning models, still available |
What ChatGPT Does Well
Section titled “What ChatGPT Does Well”- Versatile — writing, coding, math, research, translation, summarisation
- Image understanding — paste screenshots or photos, ask questions about them
- Image generation — create images via GPT Image (Plus plan) — DALL-E was retired from the API in May 2026
- Voice conversations — natural real-time voice back-and-forth
- Custom GPTs — pre-built specialized assistants for specific tasks
- Plugins and web browsing — search the web, run code, analyse files
Key Features
Section titled “Key Features”| Feature | Description |
|---|---|
| GPTs (Custom AI Agents) | Community-built specialized ChatGPT versions (e.g., PDF Analyzer, Coding Tutor) |
| Canvas | Collaborative writing and code editor inside ChatGPT |
| GPT Image | Generate images from text prompts (successor to DALL-E) |
| Code Interpreter | Run Python code, analyze CSVs, create charts |
| Web Browsing | Search the internet in real time |
| File Uploads | PDFs, Word docs, images, spreadsheets |
| Voice Mode | Real-time audio conversation |
| Memory | Remember information across conversations |
| Plan | Price | Key Features |
|---|---|---|
| Free | $0 | Limited access to lower-cost models, basic features |
| Go | ~$8/month | Budget tier between Free and Plus |
| Plus | $20/month | GPT-5.6 Sol, image generation, web browsing, custom GPTs, more |
| Pro | $200/month | Highest usage limits, most capable reasoning models, advanced voice |
| Team | $25/user/month | Shared workspace, admin controls |
| Enterprise | Custom | SSO, audit logs, longer context |
Exact plan names, prices, and included models change fairly often — check OpenAI’s official pricing page for the current lineup.
ChatGPT for Coding
Section titled “ChatGPT for Coding”ChatGPT is excellent for coding tasks:
- Write functions from natural language descriptions
- Explain what code does in plain English
- Debug errors — paste the error and code
- Refactor and optimize code
- Generate unit tests
- Translate code between languages
For a terminal-based coding agent from OpenAI, see OpenAI Codex CLI.
ChatGPT vs Claude vs Gemini
Section titled “ChatGPT vs Claude vs Gemini”| Feature | ChatGPT | Claude | Gemini |
|---|---|---|---|
| Context | Large (varies by model) | 200K–1M (varies by tier) | Up to 1M |
| Image generation | Yes (GPT Image) | No | Yes (Imagen) |
| Plugin ecosystem | Large (GPTs) | Limited | Growing (Gems) |
| Code interpreter | Yes | No | Yes |
| Voice mode | Yes | Yes | Yes |
| Web browsing | Yes | Yes (Pro) | Yes |
| Reasoning model | o1, o3, o4 | Claude Thinking | Gemini Thinking |
Useful Links
Section titled “Useful Links”- ChatGPT
- OpenAI Platform API
- ChatGPT Plus
- OpenAI Codex CLI — Terminal coding agent