Anthropic just launched its latest small-but-mighty model known as Haiku 4.5. The model promises to be faster and smarter than Sonnet 4, so of course, I just had to see how it stacked up against ChatGPT-5 in a series of seven real-world tests.

In this head-to-head showdown between ChatGPT-5 and Claude Haiku 4.5, I ran both models through a diverse set of seven prompts designed to test logic, reasoning, creativity, emotional intelligence and instruction following.

From algebraic train problems to poetic robot scenes, each task revealed how differently these two AI models “think.” What emerged was a fascinating split between precision and personality; ChatGPT often excelled at structure and clarity, while Claude impressed with emotional depth and sensory detail.

1. Logic & reasoning

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