My experience is exactly opposite. Claude excelling in ui, and react. While gpt5 being better on really niche stuff, migth just be me better at caching when gpt5 halucinates as opposed to the claude4 hallucinations.

But after openai started gatekeeping all their new decent models in the api, i will happily refuse to buy more credits, and rather use foss models from other providers (I wish claude had proper no log policies).