OpenAI has launched new GPT-4.1 models (including mini and nano variants) specifically for developers via API. These models are now available through Microsoft as well.

Adding GPT-4.1 and 4.1 mini to ChatGPT adds to an already complex model selection that includes GPT-4o, various specialized GPT-4o versions, o1-pro, o3-mini, and o3-mini-high models.