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ChatGPT is OpenAI's flagship conversational AI chatbot, capable of generating human-like text, writing and debugging code, composing essays and music, answering questions, translating languages, summarizing content, and analyzing images. Launched in November 2022, it quickly became one of the most widely adopted AI tools in the world. Users interact through text, audio, and image prompts across web, mobile, and desktop platforms. Key capabilities include custom GPTs for specialized tasks, GPT Image for image generation, Memory for recalling past conversations, and agentic features like Operator for web tasks and Codex for coding workflows.

Claude is Anthropic's AI assistant, designed for conversation, writing, coding, research, and complex reasoning. Unlike generic chatbots, Claude emphasizes helpfulness, honesty, and harmlessness through Constitutional AI training. Users can interact via text and analyze documents, images, and code. The Claude product suite includes Claude Code for agentic software development, Claude Cowork for non-technical automation, Claude Design for visual creation, and Claude Science for biological research. Available on web, mobile, and desktop with integrations for Google Drive, Gmail, DocuSign, and more.

Perplexity AI is an answer engine that combines real-time web search with AI-powered synthesis to deliver accurate, cited responses to questions. Unlike traditional search engines that return a list of links, Perplexity reads and summarizes information from multiple sources, providing answers with inline citations. Its conversational interface lets users ask follow-up questions to dig deeper. The platform includes features like Collections for organizing research, Pages for creating structured content, and a Pro Search mode that runs multiple queries to find the most comprehensive answer.