Editor's Synopsis
Matt Shumer shares his impressions after a week of testing GPT-5.4, declaring it the best model in the world "by far." He argues it is so capable that it effectively ends the debate over which AI model to use for various tasks. Perhaps most notably, Shumer reveals that he barely uses Pro mode anymore, which he frames as a surprising shift given his known usage patterns. The post signals a significant leap in model quality from OpenAI, suggesting GPT-5.4 may represent a consolidation point where one model suffices for most use cases.