I put ChatGPT-4o and 5.1 through 9 real-world tests — from logic puzzles to coding, writing and image analysis.

As someone who spends every day testing the world’s smartest chatbots, I’ve learned that not all models are great at creative work. While many can write well, most only touch the surface in terms of ...

ChatGPT 5.1 improvements across planning and writing, reducing hedging and offering step-by-step guidance you can act on ...