An Evaluation of ChatGPT, Gemini, Claude, and Perplexity - ParrotGPT
AI research tools

In the fast-paced world of technology and information, staying ahead requires the right tools to streamline our efforts. This article marks the second installment in our series on AI productivity tools. Previously, we explored AI-driven solutions for scheduling and task management. Today, we shift our focus to a critical aspect of our professional and personal lives: research.

Research is a cornerstone of innovation, whether it’s for academic pursuits, business strategies, or personal projects. The landscape of research tools has been revolutionized by AI, particularly through the power of large language models (LLMs). These models enable a dynamic chatbot experience where users can ask initial questions and follow up with deeper inquiries based on the responses received.

In this article, we will delve into four leading AI tools that can be leveraged for research projects: ChatGPT, Gemini, Claude, and Perplexity. We will assess these tools based on key criteria such as the quality of their responses, their access to current information, their ability to reference original sources, their capacity to process and analyze uploaded files, and their subscription plans. We hope that this brief overview will help you choose the best tool for your various research projects.

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Top AI Research Tools

ChatGPT, Gemini, Claude, and Perplexity are the leading LLM-powered tools that can speed up your research for both business projects and personal tasks. Let’s briefly review their strengths and weaknesses across key factors.

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ChatGPT is a state-of-the-art LLM-powered tool developed by OpenAI, designed to assist with a wide range of tasks by understanding and generating human-like text.

Quality of Responses. ChatGPT, powered by the top-performing GPT-4o model, delivers well-structured and highly informative responses. Its advanced language processing capabilities ensure that the information provided is both relevant and comprehensive, making it a great tool for diverse research needs.

Current Data Access. ChatGPT is equipped with real-time web access, allowing it to pull the latest information available online. Additionally, CustomGPTs built on top of ChatGPT can tap into specific knowledge bases, offering enhanced responses tailored to particular fields of study. Notable examples include Consensus, Scholar GPT, SciSpace, Wolfram, and Scholar AI.

Source Referencing. While ChatGPT does provide links to its sources, these references are often grouped at the end of the response. This can make it challenging to trace specific statements back to their original sources, which may require additional effort to verify the information.

File Processing Capabilities. ChatGPT supports file uploads, enabling users to analyze and extract information from various documents. This feature is particularly useful for in-depth research, allowing for the incorporation of external data directly into the chat.

Subscription Plans. ChatGPT offers a Free plan that grants access to GPT-3.5 and limited features of GPT-4o, including basic data analysis, file uploads, and web browsing. For more advanced capabilities, the Plus plan is available at $20 per month. This plan provides full access to the state-of-the-art GPT-4o model, along with comprehensive data analysis, file uploads, and web browsing functionalities.


Gemini is a cutting-edge AI tool designed by Google, leveraging powerful language models to assist with various research needs.

Quality of Responses. The application is powered by strong Gemini models. The responses are generally of high quality and effectively address the research questions posed. However, like all LLM-powered solutions, it can occasionally produce hallucinations or inaccuracies.

Current Data Access. Gemini has access to real-time information, ensuring that it provides up-to-date responses.

Source Referencing. Gemini does not provide direct links to sources within its responses. However, it includes a unique feature called the “Double-check the response” button. When used, this feature verifies the model’s statements through Google Search: confirmed statements are highlighted in green, unconfirmed or likely incorrect statements in brown, and statements with insufficient information are left unhighlighted. Additionally, links to the relevant Google Search results are provided for further verification.

File Processing Capabilities. Gemini supports file uploads, allowing users to analyze and extract information from various documents.

Subscription Plans. The basic version of Gemini is accessible for free and can handle complex requests using one of the latest models from the Gemini family, though not the most powerful. For more advanced features, users can subscribe to Gemini Advanced for $20 per month. This premium version leverages Google’s most powerful AI model, offering superior reasoning and problem-solving capabilities.


Claude is a sophisticated AI tool developed by Anthropic, designed to provide high-quality research assistance with a strong emphasis on safety and reliability. Known for its advanced language models and thoughtful design, Claude aims to deliver accurate and trustworthy responses while managing user expectations effectively.

Quality of Responses. The LLM models powering Claude are among the best in the industry, resulting in high-quality responses. Claude stands out for its focus on safety, reducing the likelihood of providing potentially harmful information. It also frequently states its limitations within its responses, such as its knowledge cutoff date and the scope of information it can access. This transparency helps manage user expectations and directs them to more accurate and up-to-date sources when necessary.

Current Data Access. Claude is designed to be a self-contained tool and does not access the web for real-time responses. Its answers are based on publicly available information up to its knowledge cutoff date, which is currently August 2023.

Source Referencing. Claude does not provide direct links to original sources in its responses. This can make it challenging for users to verify specific statements or trace information back to its origin.

File Processing Capabilities. Claude supports the upload of documents and images, allowing for more in-depth and relevant research.

Subscription plans. Claude offers a Free plan that provides access to the tool, with responses powered by the Claude 3 Sonnet model. For enhanced features, the Claude Pro plan is available at $20 per month. This plan provides access to Claude 3 Opus, the most advanced model, along with priority access during high-traffic periods.


Perplexity is a powerful AI research tool that utilizes advanced language models to deliver high-quality responses. It is designed to provide detailed and accurate information, with a particular emphasis on thorough source referencing and multimodal search capabilities.

Quality of Responses. Perplexity is powered by strong LLMs, including state-of-the-art models like GPT-4o, Claude-3, LLaMA 3, and others. This ensures that the quality of responses is generally very high. The tool is focused on providing accurate and detailed answers, supported by strong source referencing. However, it sometimes provides information that is not fully relevant, as it tends to include extensive details found online, which may not always directly answer the research question posed.

Current Data Access. Perplexity has real-time access to the web, ensuring that its responses are always up to date. This capability allows users to receive information on current events and the latest developments as they happen.

Source Referencing. One of Perplexity’s major strengths is its source referencing. Each response includes citations, making it easy to trace every statement back to its original source. Additionally, Perplexity’s search is multimodal, incorporating images, videos, graphs, charts, and visual cues found online, enhancing the comprehensiveness of the information provided.

File Processing Capabilities. The ability to upload and analyze files is available but limited in the free version of the tool, and unlimited with the Pro plan.

Subscription plans. Perplexity offers a Standard plan for free, which allows for unlimited quick searches and five Pro (more in-depth) searches per day. For more extensive use, the Pro plan costs $20 per month and allows up to 600 Pro searches per day. This plan provides enhanced capabilities for users with more demanding research needs.

Conclusion: Choosing the Right AI Research Tool for Your Needs

Each of the tools we reviewed – ChatGPT, Gemini, Claude, and Perplexity – offers unique strengths tailored to different research requirements.

ChatGPT excels in delivering well-structured and informative responses with robust file processing capabilities. Gemini stands out with its unique verification feature, though it lacks direct source referencing. Claude prioritizes safety and transparency, making it a reliable choice for users concerned about the accuracy and potential risks of AI-generated information. Perplexity offers unparalleled source referencing and multimodal search capabilities, ensuring detailed and visually enriched responses, though its relevancy can sometimes be hit-or-miss.

When choosing an AI research tool, consider the specific needs of your projects. By understanding the strengths and limitations of each tool, you can make an informed decision that enhances your research capabilities and supports your goals effectively.

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