Caktus AI
best deal
Try Caktus AI's 5,000-character free trial then upgrade to the Annual Plan for just $8.33/month to access 40+ academic tools
redeem nowWe start with direct ratings from our readers, then look at what real users are saying in practitioner forums and community spaces. We pair that with search demand data and profession-level persona analysis.
Editorial note: this was originally published in april of 2025
quick take
based on real user feedback, community sentiment, pricing value, and fit for target audience. see our full methodology
used Caktus AI? we'd love to know your thoughts
reader ratings shape our score
Caktus AI is an education-first learning platform that helps students and professionals tackle academic writing, coding, STEM problems, and language learning. Created by Stanford University students Harrison Leonard and Tao Zhang in 2022, this tool combines artificial intelligence with practical learning applications.
The platform offers tools for essay writing, coding assistance, and STEM problem-solving. The math solver provides step-by-step solutions for subjects like math, physics, and chemistry, while the flashcard creator and quiz tools help with study sessions. For writing tasks, users can generate citations in APA, MLA, and Chicago formats and optimize their content.
The platform runs on Caktus AI's proprietary Eguana model, which has been fine-tuned specifically on academic data. This makes it different from general-purpose AI tools. It currently supports students in more than 80 countries and includes features for educators to create classes, monitor student usage, and upload learning materials.
Users can try Caktus AI through a free trial before choosing a subscription plan. The platform includes multi-language support and a humanizer feature to help make AI-generated content sound less robotic, while maintaining academic integrity through revision and ethical use practices.
monthly search interest
590/mo now
Caktus AI spiked hard in late 2022 as one of the first student-facing AI homework tools, hit its peak in January 2023, and has fallen 97% since. That's not a gradual maturation: it's a product that caught a viral moment and hasn't held the audience. The hype has long passed, so what's left is the actual product serving a small, stable base of repeat users. If you're picking it up now, you're not riding any wave, you're just evaluating whether it does the job.
Whether Caktus AI is worth it depends almost entirely on what you're trying to do with it. Pick your role below to see the honest breakdown.
overall sentiment
select your role to see what people like you are saying
College Student
mixedCaktus AI gives you a fast starting point for essays and brainstorming, and at $8.33 a month on the annual plan it's cheaper than most alternatives. The catch is that the output is generic enough that you'll spend meaningful time rewriting it, and the AI-detection evasion claims don't hold up reliably, which is a real problem if your institution scans submissions. Use it for scaffolding, not finished work.
strengths
concerns
STEM Student
mixedThe step-by-step problem breakdowns can help you understand how to approach a question, but the tool gets the maths wrong often enough that you can't trust the answers without checking them yourself. For late-night study sessions where you need a method explained, it's useful. For anything you're submitting, verify every solution independently before you do.
strengths
concerns
International Student
positiveIf you're writing in English as a second language and need citation formatting alongside translation support, Caktus AI covers both in one place at a price that undercuts hiring a tutor. The built-in APA, MLA, and Chicago citation tools remove one layer of stress from assignment formatting. Just know that the generic output still needs editing to reach the academic English standard expected at university level.
strengths
concerns
Educator/Professor
negativeThere's no meaningful use case here for educators. The tool is built to help students produce academic work faster, including work that's meant to evade AI detection, which puts it directly in tension with academic integrity policies. If you're evaluating it to understand what your students are using, the free trial gives you a clear picture quickly.
strengths
concerns
“The collapse in search interest since 2023 tells its own story: Caktus AI caught a viral moment and hasn't held the audience.”
The available community sources on Caktus AI are thin, and neither of the indexed reviews comes from an independent user forum. The most detailed external write-up is from a competing tool's blog, which tested Caktus AI's essay output and found it serviceable for outlines but weak on depth and factual reliability. Across commercial review platforms, the pattern is consistent: users flag that the 5,000-character free trial runs out before you can properly evaluate the tool, that essay outputs read as obviously AI-generated without heavy editing, and that the 'undetectable' AI claims don't hold up under scrutiny from AI detectors. The subscription cost, starting at $14.99 a month or $8.33 a month on an annual plan, draws complaints when users realise the output still needs significant rework before it's usable.
It depends on which plan you're on. At $14.99 a month on the monthly base plan, it's hard to justify when ChatGPT Plus costs the same and does more. The annual plan at $8.33 a month is more reasonable if you genuinely use it across essay writing, citation formatting, and STEM help throughout a full academic year. Don't pay monthly if you only need it for one semester.
International students get the most genuine value, specifically those adapting to English-language coursework who need citation formatting in APA, MLA, or Chicago alongside translation support. College students who want quick essay outlines and brainstorming help, rather than finished essays, also get real use out of it. STEM students should be cautious: the step-by-step breakdowns can help with understanding, but you'll need to verify solutions independently before submitting anything.
Two problems come up consistently. First, factual accuracy: both essay content and STEM solutions can be wrong, which means every output needs independent verification before use. Second, the 'undetectable AI' claims are unreliable in practice. Users report that outputs still flag on common AI detectors, which matters a lot if your institution uses them actively.
ChatGPT Plus at $20 a month gives you a more capable general model, better factual accuracy, and a much wider range of tasks. Caktus AI's edge is its academic structure: built-in citation generators, purpose-built student tools, and a simpler interface designed for homework rather than open-ended tasks. Choose Caktus if you want guardrails and academic formatting baked in. Choose ChatGPT Plus if you want raw capability and don't mind doing your own structuring.
No, not without checking them yourself first. The step-by-step format is useful for understanding how to approach a problem, but the tool produces mathematically incorrect answers often enough that submitting without verification is a real risk. Treat it as a study aid that shows you a method, not an answer key.
toolsforhumans editorial team
Reader ratings and community feedback shape every score. Since 2022, ToolsForHumans has helped 600,000+ people find software that holds up after launch. how we research →
ChatGPT is an AI chatbot by OpenAI that uses language models to hold conversations, generate content, and complete tasks. It includes web browsing, image generation and analysis, voice interaction, autonomous task automation, and custom GPT creation. Available in multiple pricing tiers from free to enterprise, ChatGPT handles creative writing, data analysis, coding, and real-world automation.
best deal
Try ChatGPT Free: Basic AI conversations with GPT-5.2 Instant access (around 10 messages every 5 hours) at no cost.
Gemini is an advanced AI assistant by Google that processes text, code, images, audio, and video across Google's ecosystem. It offers content creation, coding assistance, research capabilities, and workflow automation through the Gemini app, web interface, and integrations with Google Workspace, Pixel phones, and Chrome.
best deal
Google AI Plus: Get 50% off at $3.99/month for the first 2 months (new subscribers); Google AI Pro: Try free for one month.
Microsoft 365 Copilot is an AI-powered productivity tool that integrates seamlessly with Microsoft 365 apps like Word, Excel, PowerPoint, and Outlook. It uses advanced language models and Microsoft Graph to provide intelligent, context-aware suggestions, automate tasks, and enhance collaboration by generating content, analyzing data, and offering real-time insights across various work processes.
best deal
Try Copilot Free: Experience basic AI assistance without Office integration
Claude is an AI assistant developed by Anthropic that handles coding, writing, and analysis tasks. It uses Constitutional AI for safety-focused interactions, supports multiple languages, and offers models like Sonnet and Opus with different capabilities. Claude prioritizes user privacy and context-aware responses.
best deal
Try Claude Free - 30-100 daily messages with code generation, image analysis, web search, and access to Claude's latest models
Perplexity AI is an AI-powered search engine that provides real-time, conversational responses to user queries. Founded in 2022, it uses natural language processing and large language models to deliver answers with source transparency. The platform offers multiple search modes, supports file and image uploads, and provides both free and paid plans for individual users and businesses.
best deal
Try Perplexity Free - Get unlimited basic searches with citations, 5 daily Pro Searches, and save your search history with access to basic AI models.
PhotoAI.me is an AI-powered platform that transforms personal photos into unique, high-resolution images across 100+ styles for various social media platforms. Users can upload a photo, select a themed package, and receive AI-enhanced images within hours, making profile personalization simple and quick for those seeking professional or creative profile pictures without advanced editing skills.
best deal
Transform your profile photo with 100+ AI styles starting at $19/month