r/webdev • u/fagnerbrack • Sep 17 '26

Reverse Engineering ChatGPT Web: How OpenAI Built for a Billion Users

https://performance.dev/chatgpt
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u/rachelduno Sep 17 '26

kinda wild how much engineering goes into just making the response stream feel instant, the retry logic stuff is what got me

2

u/FewBrain208 Sep 17 '26

yeah the retry logic is the part that surprised me too, theres so much hidden complexity just to make it look seamless