If you open ChatGPT or Claude, you don’t need to scroll through a model picker to get started. Each has a default experience that their parent company believes represents the future of everyday AI.

OpenAI’s latest default ChatGPT-5.2 model and Anthro­pic’s Claude Sonnet 4.6 are designed to be fast, helpful and broadly capable, handling everything from quick emails to complex explanations without requiring technical know-how.

But how do these “just open and use” models actually compare when put to real-world tasks? Especially now that Claude has dethroned ChatGPT as the #1 chatbot app in the Apple store.

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If you’re wondering which default AI assistant deserves a permanent spot in your workflow, this comparison puts them through the kinds of tasks you’re most likely to rely on — and reveals where each one excels.

Here’s a look at how the two compare through seven challenging tests.

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