Looops Now Runs on Claude Sonnet 5

What is Claude Sonnet 5?

Claude Sonnet 5 is the latest model from Anthropic, released on June 30, 2026. It is the newest member of the Sonnet family, the balance of speed and intelligence that most people use day to day, and it is a clear step up from the previous generation.

The biggest gains are in exactly the areas that matter when an AI builds a real website: writing solid code and following multi-step instructions. Anthropic positions its quality as close to their flagship Opus model, so on Looops you are getting near top-tier capability on every build, not a stripped-down helper.

What actually gets better when it builds your site

Building a website is not one instruction, it is dozens of small decisions in a row: structure the pages, write the copy, lay out the sections, wire up the forms, keep the design consistent. A model that is better at holding a plan and following through produces a better site with less cleanup. That is where Sonnet 5 shines.

• More accurate first drafts, so there is less to fix after the initial build.
• Better at complex, multi-page sites without losing track of what it already built.
• Follows your instructions more closely when you refine by chatting.
• Cleaner code under the hood, which means fewer errors and a more reliable result.
• Better taste and fewer rough edges in the final design.

Sonnet 5 on Looops at a glance

Here is what the upgrade means in practical terms, mapped to what you actually experience when you build.

It keeps your whole project in mind

Sonnet 5 has a 1M-token context window, which is a technical way of saying it can hold far more of your site in view at once. This is one of the quieter but most useful improvements for real builds.

For you, it means the AI stays consistent across pages, remembers your earlier instructions deeper into a build, and handles bigger sites without dropping the thread. If you have ever watched an AI forget a design decision it made three steps ago, more context is the fix.

Where the upgrade matters most

You will feel Sonnet 5 most on the builds that ask the most of it:

• Complex, multi-page sites, where staying consistent across many pages is the hard part.
• Sites with a database or CMS, where the AI has to wire up real content, not just lay out a page.
• Ambitious designs, where taste and follow-through separate a polished result from a generic one.
• Long refining sessions, where remembering everything you have asked for keeps the site coherent.

And it is still fast

Here is the honest catch with newer models: they tend to reason more before they act, and that reasoning takes time. Sonnet 5 turns that extra thinking on by default, which is great for hard problems but overkill for a straightforward build, and it would have made every site slower to generate.

So we tuned Looops to build without that unnecessary back and forth on standard builds. You get Sonnet 5's smarter output at the speed you are used to. Smarter does not have to mean slower, and we did the work to make sure it does not.

Why we always run the best available model

With an AI website builder, the model is the product. It is the difference between a site that looks templated and one that looks like someone who knows what they are doing made it. So our approach is simple: run the best model available, and move to a better one the moment it ships. Today that is Claude Sonnet 5.

The other half of that philosophy is ownership. A great build is only worth so much if you are locked into the platform that made it. Looops writes real code you can download and host anywhere, so the quality you get from a top-tier model is quality you actually keep. Best model in, real site out, yours to own.

How to use it

There is nothing to do. Sonnet 5 is already live and is the default model for new builds. You can switch between models anytime from the model selector in the builder, and your existing projects keep working exactly as before.

Open Looops, describe the site you want, and the upgrade is already under the hood. If you have been meaning to try a bigger or more ambitious build, now is a good time.