Perplexity AI

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.

Gemini is Google's family of multimodal AI models that handle text, images, audio, video, and code within a single conversation. Available as a chatbot at gemini.google.com, through Google AI Studio for developers, or integrated across Google products like Search, Workspace, and Android. The model lineup ranges from Flash-Lite for fast, cost-efficient tasks to Pro and Ultra for complex reasoning and multimodal work. Key features include a massive 1 million token context window, native audio output, image generation through Nano Banana, agentic capabilities, and an experimental coding agent called Jules.

Consensus is an AI-powered academic search engine that finds and synthesizes insights from scientific literature. It searches over 200 million academic papers and provides evidence-based answers with citations. Unlike general search engines, Consensus focuses exclusively on peer-reviewed research, making it valuable for students, researchers, and professionals who need trustworthy information backed by studies. The AI summarizes findings, identifies consensus across papers, and highlights areas of disagreement in the literature.

Elicit is an AI research assistant that helps researchers find, summarize, and extract data from over 125 million academic papers. It automates systematic literature reviews, generates research reports, and extracts data from papers at scale. Elicit can analyze up to 20,000 data points simultaneously and find up to 1,000 relevant papers. All AI-generated claims are supported with sentence-level citations. Used by over 2 million researchers in academia, pharmaceuticals, and policy, Elicit aims to make research 10x more evidence-based.