OpenAI’s invitation to GPT-5.5’s launch party said the vibe would be intimate: a “low-key” gathering with CEO Sam Altman, drinks, swag, and a few hundred developers celebrating the company’s latest AI model at its San Francisco headquarters.
Instead, it became one of the hottest tickets in tech, with more than 8,000 people scrambling to get into a party that Altman says ChatGPT itself helped plan.
While it remains unclear how many applicants were ultimately offered access to the exclusive event, those who were accepted were quick to tout their status on social media. However, the rejects still got a party favor: OpenAI offered upgraded Codex rate limits to everyone who requested a ticket, granting additional free access to its coding agent.
Inside, photos posted by attendees show the vibe was somewhere between a developer meetup, a Hollywood premiere, and a very expensive social experiment.
OpenAI did not respond to a request for comment from Business Insider.
An invite felt like a golden ticket
Is today!! see you in the @OpenAI HQ GPT-5.5 Party pic.twitter.com/8xGPUnIngQ
— Diego | AI 🚀 – e/acc (@diegocabezas01) May 5, 2026
It looked like an Apple store opening
At the OpenAI 5.5 party now. pic.twitter.com/Tt0UvycxXo
— Ahmad Awais (@MrAhmadAwais) May 6, 2026
Everyone wanted a photo with sama
really dope party 🔥🔥🔥@sama @OpenAI pic.twitter.com/3crw3ln6kH
— alpha_rover (@Alpha10six) May 6, 2026
Met a really cool person at an AI party😊 @openai @sama pic.twitter.com/ODouAKRYLm
— Derya Unutmaz, MD (@DeryaTR_) May 6, 2026
People wore goblin ears
went full goblin mode with @sama https://t.co/yUg0rO0PnS pic.twitter.com/AOT2nNvbgN
— Kate Deyneka (@katedeyneka) May 6, 2026
Swag included nerdy socks
a few things i collected from the party pic.twitter.com/9LOVnwNL7P
— nic (@nicdunz) May 6, 2026
Someone bought a Sama Lisa?
Such an awesome party, very cool talking to you @sama and the Codex team! pic.twitter.com/bvca8bQqJJ
— thegraxisreal (@thegraxisreal) May 6, 2026
And he was asked to sign it
update – they have brought him a sama lisa pic.twitter.com/KAvlIPh8nr
— Alex (@AlexanderTw33ts) May 6, 2026
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