Then it was 4.0

A look at everything going on in the world of Replit.

May 29, 2025

Claude Sonnet 4.0 is out, and Replit were ready, with it ready to go in Agent from day one.

The annoying thing with 3.7 is that you’d ask Agent for one thing, and end up with five other things. Sometimes helpful, often not quite. And if you tried to fix things, it could be hit or miss.

Seems we’re back on track!

And 4.0 is good at multi-tasking, which means we should be able to ship more stuff, faster.

Fix my code…

How many times a day do you end up typing that into Replit? Doesn’t matter, stop it now.

Replit has released a guide on how to do decent prompting.

Replit Docs

Learn principles and see examples for writing effective prompts when using AI development tools like Replit Agent and Assistant.

docs.replit.com/tutorials/effective-prompting

Achieve More With Limited Resources: 15 Small Budget Success Stories

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Looking for ways to stretch your marketing budget further? These 15 mini case studies show exactly how these small brands made such big waves without breaking the bank.

Better vibe coding

While we’re on the subject of better…

Will Replit kill Excel?

I’m not convinced, but a world where critical systems aren’t held together by 20 year old spreadsheets that nobody knows how to edit… would be nice!

No more wasting 5c to change one word!

Long overdue, Replit is rolling out a visual editor for apps built with JavaScript.

The days of spending your hard-earned vibe coding $$ on prompts like “please make that text bigger” are gone.

First, it builds, then it tests

You saw it here first. Replit is cooking up a way for Agent to test the apps it builds.

Price changes incoming?

Amjad wants to know what you think.

Hire an AI BDR & Get Qualified Meetings On Autopilot

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Dive in on Notion + Replit

A few weeks ago, there was a big, splashy announcement that you can now easily integrate Notion with Replit. It’s basically the easiest way to build a CMS-driven site on Replit.

And now Matt has published a deep dive tutorial.

Favourite app shut down? Just rebuild it.

Pour one out for everyone’s favourite Pocket, which has announced it’s shutting down.

Never fear, though, Yohei has vibe coded it back from the dead.

And he didn’t stop there…

Live vibe coding

I’ll leave you with a live vibe coding session from Matt. A SaaS app built from scratch in under an hour.