ChatGPT
chatgpt.com
The chatbot that made everyone else build a chatbot
AI Playground
Anthropic's assistant, strongest on long documents
claude.ai
Instant · Works anywhere
Free, sign-up needed · online since 2023
A chat assistant that accepts long files, writes and runs code, and builds shareable artifacts inside the conversation itself. The free tier carries daily message limits. People tend to reach for it when the task is careful writing or reasoning across documents.
Dropping in a hundred-page PDF and asking what changed between two versions is the task where the long context earns its keep.
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Picked for a shared category and overlapping vibe, not for popularity.
chatgpt.com
The chatbot that made everyone else build a chatbot
gemini.google.com
Google's model, wired into search and your files
perplexity.ai
Answers with the sources listed underneath
notebooklm.google.com
Upload your sources, get a podcast about them
teachablemachine.withgoogle.com
Train an image classifier in about four minutes
huggingface.co
Transcribe audio locally, with no upload anywhere