OpenAI has discontinued its dedicated Codex programming model, fully integrating its capabilities into the main GPT-5.5 model. This marks a strategic shift back to a generalist approach, where a single powerful model handles all professional scenarios, including coding. The integrated GPT-5.5 shows improved performance in autonomous programming tasks and resource efficiency, despite a roughly 20% API price increase. This move signals that AI programming is now a core competency of general-purpose large models.