OpenAI terminates the Codex product line and fully integrates it into GPT-5.5
OpenAI announced on April 26 that it has terminated the dedicated programming model Codex, integrating its core capabilities into the main GPT-5.5 model. Since GPT-5.4, the dedicated programming branch has disappeared, making GPT-5.3 the last standalone Codex model. This move marks OpenAI's return to a 'generalist' strategy, using a single powerful system to cover all specialized scenarios, including programming.