Every time a new AI model launches, I’m always eager to test it and compare it to what is currently available. So with the recent launch of Claude 4.5, the AI model that Anthropic is calling “its smartest model yet,” I couldn’t wait to test it against ChatGPT-5.
To see how ChatGPT and Claude 4.5 stack up against each other, I ran them through nine challenges that cover different skills including tricky logic puzzles, math word problems and debugging code for reasoning and accuracy. Of course, I had to throw in creative writing and style-shifting since both models claim to excel in those areas, too.
Here's what happened when I put these two powerful models through a face off and the surprising results.
