I'll use the model picker as it looks like on June 28, 2025 (Eastern time) from a new, empty chat. Different models will roll out to different people at different times, so what I see will count. I won't bet on this question.

Currently, I see GPT-4o, GPT-4.5 (research preview), o3, o4-mini and o4-mini-high, and GPT-4o-mini.

Clarifications:

• Models hidden behind "More models" do not count

• Generally, model names need to match up to case, punctuation, and spacing. So o3-mini doesn't count for o3, but O3 or o-3 would. But I will remove any parts that don't qualify the foundation model, for instance, o3 with canvas will count for o3. I will also exclude "research preview", "-high" and "-low", and also "-preview" if it comes back, BUT NOT "-mini"