Claude
claude.ai
Anthropic's assistant, strongest on long documents
AI Playground
The chatbot that made everyone else build a chatbot
chatgpt.com
Instant · Works anywhere
Free, sign-up needed · online since 2022
OpenAI's assistant handles writing, code, analysis, images and voice from a single text box. The free tier covers general questions and file uploads with usage caps, while paid plans open up the larger models. An account is required before the first message goes through.
Pasting in a messy spreadsheet or a photograph of a handwritten note and getting structured text back is still the demonstration that lands with people.
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Picked for a shared category and overlapping vibe, not for popularity.
claude.ai
Anthropic's assistant, strongest on long documents
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