William Liu

Vector Databasing @ExaAILabs // I Love Trains 🚂 // Worked on ML Compilers @Amazon, @Nvidia, @Uber // CogSci & CS @CarnegieMellon

[Exa @ExaAILabs]

Introducing Exa Agent: frontier web research at less than half the cost of GPT 5.5 and Opus.

/agent orchestrates a mixture of cost-effective models to complete any web research task, from simple data enrichments to building gigantic lists.

[William Liu @liuwilliam47]

@ExaAILabs HUGE

[William Liu @liuwilliam47]

money in the bank, pimpin' ain't easy

[Exa @ExaAILabs]

We raised $250M in Series C funding at a $2.2B valuation, led by a16z.

Exa is a search lab organizing the web's data for agents.

[William Liu @liuwilliam47]

👀👂🏻👃🏻

[Exa @ExaAILabs]

Introducing Exa Monitors - your agent’s radar for the web

Exa is a search engine built from scratch, and today we're exposing our "update" layer. Simply define what to find and how often - Monitors will return any new information, via webhook.

[Exa @ExaAILabs]

Exa powers most of the popular coding agents. We wrote about how we build and evaluate coding-related web search.

Blog and open evals: https://t.co/dwnVmYCJO3

[Exa @ExaAILabs]

We're excited to be powering search in Browserbase!

Exa can now be used inside of @browserbase sessions, increasing speed and quality of browser agent tasks.

[Exa @ExaAILabs]

Introducing Exa Deep: putting an agent inside every search

For each query, an agent runs in a loop until it gathers all information, then returns structured output.

Evals show Deep is Pareto optimal at 4-60s latency, ideal for quick, cost-efficient research!

[William Liu @liuwilliam47]

@artemon @ExaAILabs wow what a cool article

[William Liu @liuwilliam47]

first project in the bag

[Exa @ExaAILabs]

Introducing Exa Instant: the first sub-200ms search engine.

Faster than Google, it's custom built to power realtime AI products like chat and voice.

[William Liu @liuwilliam47]

@jsn_zh 🙇🏻‍♂️🙇🏻‍♂️

[William Liu @liuwilliam47]

Introducing Perpetual

An AI agent that automates biology experiments

Describe your protocol in natural language - our agent interprets, validates, and executes on real lab hardware

Let scientists focus on discovery, not execution

👇🏻 demo v0

[William Liu @liuwilliam47]

@gregerativeai i just signed my lease 2 days ago and this triggered immense ptsd

[William Liu @liuwilliam47]

@gregerativeai who?

[Y Combinator @ycombinator]

Swerve (@GetSwerveApp) lets you snap AI videos with friends.

Now live on the App Store: https://t.co/L3cJt0SPFQ

[William Liu @liuwilliam47]

@jiratickets i just berate chatgpt until it does what i need

[William Liu @liuwilliam47]

@eter_inquirer bro please get the M4 Macbook Air. literally so good. and no fan so the Airs last forever

[William Liu @liuwilliam47]

@iamsambo_ @wecanbefags a very pan take tbh

[William Liu @liuwilliam47]

@NicholasLiu77 LOL true

[William Liu @liuwilliam47]

i wanna start using AI in my IDE (i currently just copy-paste to ChatGPT)
how do Cursor, Windsurf, and Copilot compare?

if it matters: i'm mostly working on systems code (compiler, and runtime) mostly in C++, and scripting in Python

[William Liu @liuwilliam47]

@NicholasLiu77 yeah that makes sense. very unfortunate