Have you ever stopped to think about how artificial intelligence has changed everything? Professionals, students, companies — everyone is using it. What used to cost a fortune and required advanced knowledge is now accessible, free. Writing, video editing, automation, data analysis — there’s an AI tool for practically everything.

I’ve selected the best options that actually work in 2026. I’ll detail how each one works, who it’s for, the limitations of the free plan, and when it’s worth paying.

ChatGPT remains the most popular, and for good reason. The free version now accesses GPT-5 models (with a limit of about 10 messages every 5 hours), after which it uses faster mini versions. Still, you can write, summarize, generate basic images, and program. The free plan offers limited access to GPT-5, unlimited use of the mini model after reaching the limit, basic image generation with a daily limit, web browsing, and data analysis with limited uploads. If you want more, Plus costs $20/month with higher limits, faster responses, and more advanced images.

Google Gemini is Google’s bet to compete directly. It has evolved significantly and now runs Gemini 2.x models with multimodal responses and deep integration into the Google ecosystem. The big difference? Direct connection to search — real-time updated answers. Perfect for research and quick decisions. On the free plan: access to standard Gemini, answers with real-time web data, daily image generation limit, basic integration with Gmail/Docs/Drive. The paid version (Google One AI Premium) costs around R$79/month and offers more advanced models, better performance, and the ability to handle extensive PDFs.

DeepSeek caught attention for its performance and low-cost business model. It offers direct answers, good analytical capacity, efficiency in long tasks — math, logic, programming. Unlimited use on the official site, quick responses, good performance in calculations.

For video creators, Lumen5 automatically turns text into video. Ideal for social media, educational content, repurposing posts. Free plan: basic creation, a monthly project limit (up to 5 videos), standard templates, export with watermark. Paid plans starting at $19/month remove the watermark and unlock premium templates.

SciSpace is pure gold for students and researchers. It interprets complex texts, explains scientific articles, simplifies technical language. Unlimited explanations on the free plan, article uploads, topic suggestions. Paid version costs $10/month with advanced analysis and bibliography.

Descript makes podcast and video editing easier — automatically edits captions, removes noise, cuts clips by selecting text. Free plan includes basic editing, limited transcription, standard export. Paid starts at $12/month with Studio Sound audio and unlimited transcription.

ChatPDF converts any PDF into a conversation — you ask questions about the content. Useful for contracts, manuals, standards, extensive reports. Unlimited conversations, no registration required, fast recognition. Paid from $5/month for larger PDFs and history.

This Person Does Not Exist generates photos of people who don’t exist — no copyright restrictions. Mockups, research, advertising material, design testing. Unlimited use, realistic images, no registration. And best: completely free, no paid plan needed.

Midjourney continues to be top in image generation. Versions V7 and V8 improved visual quality, realism, understanding of complex prompts. Now offers short video generation from images. But note, it lost the free plan — only works via subscription. Basic costs $10/month, Standard $30/month, Pro $60/month, Mega $120/month.

NightCafe is another cool option for digital art — various artistic styles, 3D, painting effects, abstracts, avatars. Daily credits on the free plan, public gallery, basic filters. Paid plans start at $5/month for extra credits.

Quick summary: if you need text, ChatGPT + Gemini + DeepSeek cover everything. For images, ChatGPT and NightCafe work well. Video and productivity? Lumen5, Descript, and SciSpace complete the set. With these free AIs available now, anyone can create more, better, and faster — at no cost.