The Replit Team

Smarter with realtime app design preview

In partnership with Anthropic’s Claude 3.7 Sonnet launch, we're excited to announce the release of Replit Agent v2 in our early access program.

The early access program is available exclusively to users on Replit paid plans who have opted in to Explorer Mode (for instructions on opting in to Explorer Mode, see below). While we're encouraged by initial results, you may encounter speed bumps and areas needing improvement as we continue development.



What's new:


A more autonomous Agent

Introducing Replit Agent v2 in Early Access

Ornella Altunyan



We’re extremely excited to announce Replit’s very first Machine Learning Hackathon, in partnership with Weights and Biases! If you’re interested in joining the waitlist, head over to the official site.

Weights and Biases is a machine learning platform that tracks everything you need to make your models reproducible – from hyperparameters and code to model weights and dataset versions. If you’ve never worked with W&B, check out this example Repl for an introduction!

The total prize pool is over 500,000 Cycles – there are multiple opportunities to win, with prizes for Best Weights & Biases Report, Best Repl, an Honorable Mention, and of course, the Grand Prize of 300,000 cycles.

Apply for Replit’s first Machine Learning Hackathon

A Ghost ... that codes. Today we unleash Ghostwriter, Replit's Coding AI, to the public for 1,000 Cycles ($10) per month.

Ghostwriter makes coding fast, easier, and more fun. Tasks that used to be annoying or slow, just aren't anymore. Your coding, but better. Code with your AI pair programmer, on any device, anywhere. Try Ghostwriter, and you will never go back.

Celebrate Halloween by getting your spooky software creating companion today. Want instant access? You can buy it. Want to try it out? We're offering a limited trial on a first come, first serve basis. Apply here.

For two months, we've been hard at work beta testing the AI features. Taking user feedback. Fine-tuning. Everything we can do to make Ghostwriter one of the most powerful AI programming tools on the planet.

Meet Replit Ghostwriter, your partner in code

Amjad Masad

Samip Dahal

Luis Héctor Chávez


Large Language Models (LLMs) are known for their near-magical ability to learn from very few examples -- as little as zero -- to create language wonders. LLMs can chat, write poetry, write code, and even do basic arithmetic. However, the same properties that make LLMs magical also make them challenging from an engineering perspective.

At Replit we have deployed transformer-based language models of all sizes: ~100m parameter models for search and spam, 1-10B models for a code autocomplete product we call GhostWriter, and 100B+ models for features that require a higher reasoning ability. In this post we'll talk about what we've learned about building and hosting large language models.



Nonsense

Any sufficiently advanced bullshit is indistinguishable from intelligence, or so the LLM thought. LLMs are super suggestible -- in fact, the primary way to interact with LLMs is via "prompting." Basically, you give the LLM a string of text and it generates a response, mostly in text form although some models can also generate audio or even images. The problem is, you can prompt the LLM with nonsense and it will generate nonsense. Garbage in, garbage out. Also, LLMs tend to get stuck in loops, repeating the same thing over and over again, since they have a limited attention span when dealing with some novel scenarios that were not present during training.

Productizing Large Language Models

Alexandre Cai 

Giuseppe Burtini

Update: Ghostwriter is out now!

In 2018 when we announced Multiplayer Mode, we said it's the most significant evolution of Replit to date. For the first time, you could share a URL with a friend, student, or coworker and get a shared text editor and runtime — no setup required. Replit Multiplayer is changing how an entire generation of programmers learn how to code and make software.

Today, we're announcing Ghostwriter, which infuses state-of-the-art intelligence into nearly all IDE features. Ghostwriter sports an ML-powered pair programmer that completes your code in realtime, tools to generate, transform, and explain code, and an in-editor search utility that lets you find and import open-source code without leaving your editor (think Stackoverflow in your editor).



Introducing Replit Agent v2 in Early Access

Apply for Replit’s first Machine Learning Hackathon

Meet Replit Ghostwriter, your partner in code

Productizing Large Language Models

Ghostwriter AI & Complete Code Beta