With both ChatGPT and OpenAI’s API, the company plans to “release GPT-5 as a system that integrates a lot of our technology, including o3,” Altman says, adding that “we will no longer ship o3 as a standalone model.” OpenAI first teased o3 in December and launched o3-mini in January.

In a series of recent posts on X, Sam Altman shared OpenAI’s roadmap for GPT-4.5 and GPT-5. He mentioned that GPT-4.5 will be shipped next, and it will be OpenAI’s last “non-chain-of-thought model“ A user asked about ETA for GPT-4.