Quick overview
ChatGPT (OpenAI) and Claude (Anthropic) both handle chat, documents, and code. ChatGPT has the widest plugin ecosystem; Claude is known for long context and careful, structured replies.
Writing & analysis
For marketing copy and brainstorming, ChatGPT often feels more creative out of the box. Claude excels at summarizing long PDFs and maintaining tone across long threads.
Coding help
Both generate solid snippets. Developers often use ChatGPT for quick fixes and Claude for reading large codebases pasted into context. Pair either with Cursor for IDE integration.
Which to choose
Choose ChatGPT if you want voice, image tools, and the largest third-party ecosystem. Choose Claude if you routinely work with long documents and want nuanced, safety-conscious responses.