Choosing between all these AI models can feel overwhelming.
Let’s simplify it.

First, here are the major models and how many people actually use them.
Chat GPT is by far the biggest, then Google Gemini.
Then, Deepseek, Grock, Perplexity, Claude, and Mistral.

Now that you know the landscape, here is the simple rule for what to use when.

For general brainstorming, open-ended thinking, or big creative ideas, use chat GPT 5.1.
For video understanding, video analysis or anything multimodal with strong perception, use Gemini 3.
If you need to compare products, services or prices, use Grock. It is fast and great for structured comparisons.
For coding, technical work and professional writing, use Claude.
And for general questions, or research type queries, Perplexity is excellent.

This way, you stop guessing and start using the right model for the job.

If you want more clear, practical AI advice without the noise, follow along.