“Free” no longer means “weak.” The leading chatbots all ship a usable free tier; they differ on what the free plan caps. We ran the same questions through each.

1. ChatGPT — best all-rounder

ChatGPT is the safe default: drafts, codes, brainstorms, and the free tier covers everyday use. If you only keep one tab, this is it.

2. Gemini — best for long docs & Google data

Gemini handles huge inputs and pulls from your Google files when connected. Best when the question starts with “summarize this 50-page PDF.”

3. DeepSeek — best open reasoning

DeepSeek gives strong reasoning at low cost and open weights you can self-host. Best for technical users who want transparency and a free, capable model.

4. Grok — best for live/X context

Grok is wired into X, so it’s strong on real-time conversation and current-event context. Best when you want the pulse of what’s being said right now.

5. Pi — best for natural conversation

Pi is the calm, conversational one — less “answer machine,” more “talks it through with you.” Best for brainstorming where tone matters.

6. Poe — best multi-model hub

Poe isn’t one model — it’s a front door to many (including the ones above). Best when you want to swap models mid-chat without juggling accounts.

How to choose

• One do-everything tab → ChatGPT
• Long documents / Google → Gemini
• Open, cheap, technical → DeepSeek
• Real-time / X context → Grok
• A natural chat partner → Pi
• Many models, one app → Poe

Every tool above links to its full profile in our AI tools directory with editor ratings, pros, cons, and side-by-side comparisons.