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ChatGPT |
Open AI
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ChatGPT Plus |
Open AI
Starting December 5, 2024, there is a $200/month version called ChatGPT Pro.
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Microsoft Copilot | Microsoft Free, built on GPT-4 Includes web search results and image generation. You can also generate images with Bing Image Creator or Microsoft Designer (log in with a personal Microsoft account)
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Gemini |
Google
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Claude |
Anthropic
Pro version ($20/mo) Web search has been added to paid version (as for March 20, 2025) |
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Perplexity AI | Perplexity Free. Includes web search results, with citations. Offers "Focus" choices such as YouTube, Reddit, Semantic Scholar, and Wolfram|Alpha. You can use it without creating an account. The feature called Spaces makes it easy to create your own knowledge base where you can search through your class notes, syllabus, and course materials. Generate practice exams or collaboration guides for group projects. Pro account ($20/mo) allows a choice between several models: GPT-4o, Claude, and others. |
These tools are based on language models, like those from OpenAI.
Explainpaper
Upload a PDF, highlight confusing text, and get a simpler explanation. Useful for reading research papers outside your field. You can also get explanations in languages other than English.
Elicit
Find answers from 175 million research papers. Elicit uses semantic similarity, which finds papers related to your question even if they don't use the same keywords. See How to use Elicit responsibly.
Keenious
Keenious is a resource recommender tool designed to aid in the identification and discovery of scholarly research.
It analyzes writing from text documents and PDFs to recommend the most relevant articles and topics to explore using artificial intelligence combined with conventional search algorithms. It seamlessly integrates with library resources to minimize paywalls and is freely available to all CEU affiliates. Our access to Keenious is IP-based and available in the Vienna campus or if you are off-campus, make sure you are connected to the CEU VPN.
NotebookLM
Google's tool for saving and working with your own notes. You can include links to websites, Google Docs, Google Slides, YouTube, or paste in any text and then get useful summaries, quiz questions, and even a simulated podcast based on your content. Learn more in this video. Also, Google never uses your data to train NotebookLM: "your uploads, queries, or the model's responses remain private to you."
Scite AI assistant
A conversational tool made by Scite that lets you ask questions in simple language and get answers backed by real, up to date references. Think of like ChatGPT with real, up to date references, tailor-made for anyone discovering, understanding, or writing research.