Arun Vijayvergiya

I love building things. Building AGI @openai, ground zero @chatgptapp. Formerly, eng @airbnb, founder @fabric_app. Creator of the first @facebook Timeline

[Arun Vijayvergiya @arunv30]

When we cooked Sites up internally to deploy some dashboards, it caught fire within OpenAI. Excited to bring this delightful product to the world!

[OpenAI @OpenAI]

Building apps has never been easier.

With Sites, Codex can turn your work, ideas, and plans into an interactive website or app your team can explore, use, and share with a URL.

Rolling out to Business and Enterprise plans, before expanding more broadly.

[Arun Vijayvergiya @arunv30]

@karpathy I've been talking about this recently. It feels like we're going from an era of "Friends" (the whole world watches at the same time / a singular attention sink) to an era of "Netflix" (everybody gets a little bit of what they want, but there's less "shared" knowledge in society)

[Arun Vijayvergiya @arunv30]

@topazblondes Exactly. Is it rude?

[Arun Vijayvergiya @arunv30]

I’m very torn about the ethics of deciding to honk at a Waymo on the street

[Sam Altman @sama]

Throwback to a tweet from the day ChatGPT launched.

Life comes at you fast.

[Arun Vijayvergiya @arunv30]

OH: “This halftime show was not good for my kalshi portfolio”

[Arun Vijayvergiya @arunv30]

We're in an interesting middle ground where all AI's have "names" but not real "personalities" as such. I'm kind of tired of every data tool having its own cutely named AI chatbot.

[Arun Vijayvergiya @arunv30]

Agentic coding definitely turned a corner, and the pace of change is about to get a bit crazy.

[Sam Altman @sama]

GPT-5.3-Codex is here!

*Best coding performance (57% SWE-Bench Pro, 76% TerminalBench 2.0, 64% OSWorld).
*Mid-task steerability and live updates during tasks.
*Faster! Less than half the tokens of 5.2-Codex for same tasks, and >25% faster per token!
*Good computer use.

[Arun Vijayvergiya @arunv30]

@barret_zoph Welcome back!

[Arun Vijayvergiya @arunv30]

@MillionInt Great to have worked with you Jerry, and I'm really sad to see you leave. You've built one of the best teams and movements at OpenAI. Godspeed for the future.

[Arun Vijayvergiya @arunv30]

Having seen model releases for 4+ years now, what gets me now is how many different work streams have had to come together to make this possible.

We cooked, a whole 3 star Michelin meal.

[OpenAI @OpenAI]

GPT-5.2 Thinking evals

[Arun Vijayvergiya @arunv30]

Happy third birthday to @ChatGPTapp ! It’s been a fun ride!

[Arun Vijayvergiya @arunv30]

A year ago today, I signed up to be on call for this low key research preview that we were demoing to the world. We built and shipped the product in about 8 days. Nobody, and I mean nobody could have predicted how the world was going to change. Here are some screenshots from a crazy first night.

Happy birthday, ChatGPT!

[Arun Vijayvergiya @arunv30]

A couple of years ago, I hacked together a browser extension that let chatgpt drive my local browser, cookies and all. It was able to cross-reference my group chats about the airbnb I wanted to get with actual search on Airbnb. The browser unlock is pretty clutch.

[Sam Altman @sama]

10 am livestream today to launch a new product I'm quite excited about!

[Arun Vijayvergiya @arunv30]

Back in 2019, I was frustrated I couldn't make a simple product at Airbnb without having to know about the interfaces of 63 different services. So @skevy and I brought them together via a GraphQL interface that now powers much of Airbnb's business logic. It's now open source!

Congrats to the whole team, and especially Raymie Stata, who has owned and shepherded the project towards release!

[Airbnb Engineering @AirbnbEng]

We’re excited to open source our data-oriented service mesh, Viaduct, which already hosts over 1.5M lines of Airbnb code. Learn more about how it can help teams scale massive graphs and join the community. https://t.co/7T7lKOEnIb

[Arun Vijayvergiya @arunv30]

Wordlebot be like: "on average, picking <the right answer> would be more efficient in this situation".

[Arun Vijayvergiya @arunv30]

When we decided (probably late at night, like 3am) to adopt @statsig way back in 2023, there was nothing else quite like it. It’s safe to say ChatGPT would not have grown the way it did or been able to move as quickly without it.

Congrats to the team and welcome to OpenAI!

[OpenAI @OpenAI]

.@vijayeraji, founder & CEO of Statsig, will join OpenAI as CTO of Applications to lead engineering for ChatGPT & Codex, following the acquisition of Statsig. This expands our Applications leadership as we build safe, useful AI products at scale. https://t.co/K3Jc44cf0O

[Arun Vijayvergiya @arunv30]

@csvoss Congrats!

[Arun Vijayvergiya @arunv30]

GPT-5 is here! Proud to have had a tiny hand in its reasoning and long-context capabilities.

And its bar-chart drawing capabilities as well.

[OpenAI @OpenAI]

GPT-5 is here.

Rolling out to everyone starting today.

https://t.co/rOcZ8J2btI

[OpenAI @OpenAI]

Our open models are here.
Both of them.

https://t.co/9tFxefOXcg