OpenAI announces retirement of GPT-5.5 on october 14, recommends migration to new models

OpenAI has announced that the GPT-5.5 model will be retired from ChatGPT, ChatGPT Work, and Codex on October 14, 2026. The company urged users of Codex relying on GPT-5.5 to transition to GPT-5.6 Sol or GPT-6 Astra. The retirement affects all subscription plans. OpenAI emphasized that GPT-5.5 was introduced in April 2026, offering improved efficiency by reducing token consumption compared to GPT-5.4. The company also highlighted that GPT-5.5 significantly lowered token costs, reducing them to 1/35 of previous levels, and increased output per megawatt by 50 times. Additional coverage includes a report on OpenAI CEO Sam Altman discussing GPT-5.5's autonomous press conference plans, expressing hope for human developers to toast the model, though the AI itself declined to make a toast.