Timeline of shipping by them (based on https://twitter.com/E0M/status/1635727471747407872?s=20):
DALL·E - July '22
ChatGPT - Nov '22
API's 66% cheaper - Aug '22
Embeddings 500x cheaper while SoTA - Dec '22
ChatGPT API. Also 10x cheaper while SoTA - March '23
Whisper API - March '23
GPT-4 - March '23
Plugins - March '23
Note that they have only a few hundred employees. To quote Fireship from YouTube: "2023 has been a crazy decade so far"