The tweet specifically refers to the model "Seems like OpenAI updated the model" and if you look at their profile you'll see "CEO @HyperWriteAI, @OthersideAI -

The tweet specifically refers to the model "Seems like OpenAI updated the model" and if you look at their profile you'll see "CEO @HyperWriteAI, @OthersideAI - I make AIs do the impossible." as well as a pinned tweet announcing that they're building a personal assistant/agent on top of this stuff. I didn't check this part but the OpenAI employee very likely follows them and knows all this context.