Create successful apps and websites through chat — on a safe open tech stack for AI that rolls back limits
Joined October 2024
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Do you know someone who's about to build their first app?
Send them the code HALLOWEEN26 and they can try Caffeine's paid features free for a month. They describe what they want and Caffeine builds it. When it's ready, they can put it live on their own domain.
The code works for anyone without an active subscription, so it's open to new builders and to anyone coming back. Promotion runs until the end of November.
Try out paid features for a month with the code HALLOWEEN26.
For a month, you can describe an app, have Caffeine build it from scratch, and put it live on your own domain.
You can also publish it on the App Market, where other people can use it as it is or remix it into their own version. Your app can send emails, and you can see who's visiting it.
Once your app is live, it's easy to ask questions and make changes on the spot.
The code is for anyone without an active subscription, whether you're new to Caffeine or coming back, and it's open until the end of November. Already subscribed? Thank you for building with us.
If you know someone who'd like to try Caffeine, the code is theirs to use.
We've just added Mistral Large 4 to Caffeine.
It's Mistral's largest most capable model yet. Use it to build a new app or keep improving one you've already started. On Caffeine, its credit price is lower than Claude Sonnet 5.5's.
You'll find it in the model menu, and you can switch between models in the same conversation.
@MistralAI
Try out paid features for a month with the code HALLOWEEN26.
For a month, you can describe an app, have Caffeine build it from scratch, and put it live on your own domain.
You can also publish it on the App Market, where other people can use it as it is or remix it into their own version. Your app can send emails, and you can see who's visiting it.
Once your app is live, it's easy to ask questions and make changes on the spot.
The code is for anyone without an active subscription, whether you're new to Caffeine or coming back, and it's open until the end of November. Already subscribed? Thank you for building with us.
If you know someone who'd like to try Caffeine, the code is theirs to use.
caffeine retweeted
This time we're going from whiteboard idea to running app.
The idea: a job sheet for a heating crew.
Three phone screens: today's jobs, a job with photos, and a customer sign-off.
Built with @claudeai and hosted on @caffeineai.
Here's how it went.
caffeine retweeted
I thought I'd build something that most entrepreneurs or business owners would want to build.
Simply put, I wanted an e-commerce with some additional functionality.
To do that, I needed several steps.
First, I need to plan it out. Identify everything I'm going to need in that build.
Second, work out exactly the process I'm going to build it.
Hint: I'm using @claudeai and @caffeineai
Thirdly, I just have to put in the time and make sure it meets my requirements.
In this thread I'll show you my process and end result.
Two people can now build the same Caffeine app.
One person asks for a change. Caffeine rebuilds the app, and the other person watches it happen on their screen. Finish for the day and let someone else pick it up. In the morning, ask Caffeine what got built while you were away.
Nobody has to wait their turn.
When you join an app someone else built, you can ask Caffeine what it is.
Type a question in the chat, like: tell me in five bullet points what this app is about. Caffeine tells you what the app does and whether it's live yet. The chat also shows who sent each message, so you can tell who built what.
Five bullet points and you're up to speed.
We've just added Claude Sonnet 5.5 to Caffeine.
It's Anthropic's model for work you can describe clearly: fix this bug, add a booking form, polish this page. Anthropic says it's 30% faster than Sonnet 5, and cheaper than Opus 5.5.
Keep Opus 5.5 for planning something new, and hand the follow-up work to Sonnet 5.5. On Caffeine, you can switch between models in the same conversation.
You can now choose which model builds your app on Caffeine.
They aren't interchangeable. A lightweight model answers a quick question about your app fast and cheaply. A frontier model takes longer and uses more credits, because it's working through something much bigger, like planning a new app from scratch. Match the model to the job and you save time and credits.
Here's what each one is good at, and when we'd reach for it.
GPT-6 Astra is OpenAI's best model across the board, and OpenAI says the most demanding and important projects still call for it.
On Caffeine, that's the big build with a lot of moving parts. Give it a proper brief, then give it time to work.
Try: "Build an inventory system for our three warehouses, with approval steps and low-stock alerts."
You don't have to stay on one model for a whole project.
You can switch in the middle of a conversation, so plan with a frontier model, then move to Sonnet 5 or DeepSeek for the smaller jobs and keep your credits for the work that needs them. You can check each model's cost in the picker before you choose, and all of them are available on every plan.
Pick your model and start building: caffeine.ai