How to use LMArena to test AI answers side-by-side
Compare ChatGPT, Gemini, Claude, Grok, DeepSeek and more in one place for free
Most of us have our “go-to” AI tool.
For me, it’s usually ChatGPT. But after a while, I’ve noticed it learns my patterns and starts giving me the same answer style. That’s fine when I need consistency, but it can also limit fresh thinking.
Enter LMArena—a platform that lets you test-drive and directly compare answers from today’s leading AI models, side by side. I’ve been using it during the past few weeks, and it’s already reshaping how I brainstorm and create.
🔍 What’s the insight?
LMArena brings together all the big-name AI models, such as ChatGPT, Gemini, Claude, Grok, DeepSeek, and LLaMA, under one roof.
You can ask a question once and instantly compare how two different models tackle it.
You can choose which two models to pit against each other, or let the platform pick for you.
It works across text, search, and image generation (with video “coming soon”). You can even upload an image for models to adjust.
🛠 How am I using it?
Fast comparisons: Instead of opening three tabs and pasting the same prompt, I run it once and instantly see side-by-side responses.
Idea expansion: The differences in answers are often bigger than you’d expect. One model gives me the “safe” angle, while another throws out a curveball I’d never have considered. That contrast is really helpful for campaign concepts and copy variations.
Testing tone and clarity: For headlines or LinkedIn hooks, I’ll see how each model rephrases the same idea. It’s like having a panel of copywriters, each with their own style.
✅ Why I love it:
Saves time: no more clicking between tools.
Sparks creativity: the variety of answers surfaces new angles.
Flexible: I can use it for brainstorming, search summaries, or quick image edits.
It's ideal for fast, context-light queries. I wouldn’t use it for projects where I need long-term memory of past chats, but for fresh input, it’s unbeatable.
💡 Try it yourself:
Next time you’re stuck on a campaign angle or copy variation, drop the same prompt into LMArena. Compare Claude vs Gemini, or Grok vs ChatGPT. Watch how the differences shift your thinking.
You’ll quickly see why I’m keeping it in my weekly workflow.