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NEW Claude Code & OpenCode KILLER! This Just Fixed 90% of AI Coding! (Open Source)
Apr 14, 2026
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0:00
new
0:01
open source AI app builder which is
0:03
replacing cloud code and open code. So,
0:06
these are the two websites that I
0:07
personally use which are completely open
0:10
source for building full stack coding
0:12
applications.
0:14
So, this is the first first website
0:16
arena.ai. This was previously called as
0:19
LM arena.
0:21
So, inside this website it has three
0:24
modes. You can battle two anonymous
0:26
models or side by side compare two
0:28
models or directly chat with a single
0:30
model.
0:31
So, here you can unlimited
0:34
open source website it is.
0:36
So, as you can see I written the prompt
0:39
here build a image to PDF web app.
0:41
So, it actually generated all the files
0:43
for us. It's a react project. You will
0:46
see that. So,
0:48
basically generated all the source code
0:50
files for us.
0:51
And once it completed it shows you the
0:54
live preview. So, this is option A.
0:57
So, we were competing between two
0:58
models. So, this was the option B.
1:01
This was option A.
1:03
This also created the necessary files,
1:06
created the interface.
1:08
And
1:09
the thing about this website you can do
1:11
this unlimited number of time. It has
1:13
all the AI models available to them.
1:16
You click the download button to
1:18
download the source code files.
1:21
And you can even try this on different
1:23
screen sizes as well to actually check
1:26
the responsiveness of the application.
1:29
This is the very first website that I
1:31
used. It's completely open source. The
1:33
second website is llama coder
1:36
.togetherai.
1:38
So, llama coder also is a perfect open
1:41
source website for programmers to come.
1:45
So, here also I built out this
1:49
image to PDF application. It actually
1:52
generated all the source code files.
1:55
So, let me just show you from scratch
1:56
how to do this. If you just write here
2:03
uh llama coder
2:07
So, inside Google the very first website
2:09
which comes this is actually
2:12
the website that I'm talking about. So,
2:14
you can see it's on GitHub it has almost
2:16
6,000 stars.
2:18
So,
2:20
it's completely open source.
2:22
Unlimited number of AI applications you
2:25
can generate as opposed to cloud code
2:27
which is a paid subscription software.
2:30
So, right here whatever application you
2:32
want to develop you simply write
2:34
build a angular
2:41
PDF editor in browser.
2:43
So, we specifically written that I want
2:45
a angular PDF editor in browser. From
2:48
here you can change any of the AI models
2:51
like this.
2:57
So, now it will create your app.
3:00
It will show you the live preview as
3:01
well. Like this step by step it will go
3:04
and create each file.
3:06
Once it completes it will show you the
3:08
live preview.
3:13
So, I'm using both these websites for
3:15
over two years and I I haven't got any
3:18
subscription based notice. These are two
3:20
complete free websites on internet which
3:23
allows you to code your applications
3:25
without paying any kind of subscription
3:27
fees.
3:29
And this is really awesome website.
3:33
This will also save you a lot of time as
3:35
well.
3:36
Cuz you no longer need to develop your
3:38
application from scratch.
3:40
Simply type the prompt and rest the AI
3:43
will generate everything for you.
3:45
And same goes with the second website as
3:47
well arena.ai.
3:49
In the meantime it's generating that
3:51
application let me show you this one.
3:54
Previously it was called as LM arena.
3:56
Now it is short hand to arena.ai. So,
3:59
this is the
4:02
the main website here. So, from here you
4:05
can
4:07
login with your Google account.
4:09
That's only the requirement here.
4:12
You click on login.
4:16
So, just need to login here with your
4:18
Google account. So, once it completes
4:31
So, now we have different options. We
4:34
can generate text, images, videos,
4:37
coding applications as well. So, side by
4:40
side we can
4:41
also directly chat with a single model.
4:44
So, if you see the models right here it
4:46
has all the AI models of different AI
4:49
networks.
4:51
We got Claude.
4:52
We have also Gemini, Claude, Gemini 3.5,
4:56
GPT.
4:57
We also have Grok. New Spark.
5:02
So, all the Queen 3 as you can see Deep
5:05
Sea.
5:06
We also have
5:11
So, all the Kimik2 all the AI companies
5:14
have models inside this website. It's
5:17
just a charity based website where they
5:19
actually created this
5:21
to actually develop
5:23
help developers to
5:26
So, from here you simply click build
5:28
apps and websites and
5:30
whatever application you want to develop
5:32
you click on clone.
5:34
So, let's suppose you want to create a
5:36
VS code clone.
5:38
Automatically the prompt will be
5:39
written.
5:40
And now the AI will start developing
5:42
your application. So,
5:44
you can see that.
5:47
In the meantime if I see the here
6:01
it is automatically completed. So, you
6:03
can see that.
6:06
It automatically created everything from
6:09
scratch.
6:10
So, the application has built it inside
6:12
uh and react.
6:14
Uh this is the PDF editor that it has
6:17
built.
6:18
So, you can see that. So,
6:24
So, as you see that created this PDF
6:26
editor for you.
6:37
So, these are the two websites.
6:38
Definitely check this out.