OpenAI's GPT-4.1 has dominated the headlines in the last few days with some amazing capabilities. While there are not a lot of technical details about the new model, I thought it might be a good idea to use this forum to discuss some things we learned so far.
Building on the architecture of GPT-4 and its variant GPT-4o, GPT-4.1 brings substantial upgrades in coding proficiency, instruction-following capabilities, long-context processing, and multimodal reasoning. This essay offers a detailed technical exploration of GPT-4.1, focusing on its architecture, key differentiators, training methodologies, engineering refinements, and real-world impact. The goal is to provide AI practitioners with a clear understanding of what makes GPT-4.1 distinct and powerful.
