Key Highlights
Artifacts UI: This is the standout feature. Instead of burying code snippets or drafts in the chat, Claude opens a dedicated side window where it renders React apps, charts, and documents in real-time. You can iterate on a website design or a document side-by-side with the chat.
Human-Like Writing: Unlike the often verbose or robotic tone of ChatGPT, Claude’s writing tends to be more nuanced, concise, and "human-sounding" out of the box.
Computer Use (Beta): A groundbreaking (though experimental) capability that allows Claude to actually look at a computer screen, move a cursor, and type to automate tasks across different applications.
The Models
Claude 3.5 Sonnet: The "sweet spot" model. It is free to use (with limits) and is faster and smarter than the previous top-tier model (Claude 3 Opus).
Claude 3.5 Haiku: A lightning-fast, cheaper model designed for simple tasks and high-volume data processing.
Claude 3.5 Opus: (Not yet released) Expected to be the heavy-duty flagship model later this year or early next year.
Cons
Usage Limits: The free tier has much stricter message limits than ChatGPT; you will hit a wall quickly during long conversations.
No Image Generation: Unlike ChatGPT or Gemini, Claude cannot generate AI images (e.g., DALL-E); it can only analyze images you upload.
Bottom Line
If you use AI for coding, creative writing, or complex analysis, Claude 3.5 Sonnet is currently the best tool on the market. If you need a general-purpose assistant for voice mode, web searching, or image generation, ChatGPT remains the more versatile "Swiss Army Knife."