kitio.aiOpenAI Codex vs XAML.io
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. OpenAI Codex starts at $8/mo and XAML.io starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Cloud coding tasks
- Codex CLI
- IDE extension
- Desktop app
- Automatic PR review
- AI app generation
- C# and XAML code editor
- Drag-and-drop visual designer
- Web and desktop publishing
- Visual Studio project export
| Feature | OpenAI Codex | XAML.io |
|---|---|---|
| Best for | OpenAI's coding agent in the cloud, CLI, IDE and desktop app | Build .NET apps in the browser with AI, C#/XAML code or a visual designer |
| Category | Coding | Coding |
| Pricing model | Freemium | Freemium |
| Starting price | $8/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | OpenAI | Userware |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
OpenAI Codex starts at $8/mo and XAML.io starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
6 plans
Free
Free
- Limited Codex usage
- Via ChatGPT account
Go
$8/mo
- ChatGPT Go plan
- More Codex usage than Free
Plus
$20/mo
- ChatGPT Plus plan
- Codex in CLI, IDE and cloud
Pro
$100/mo
- Starting price; $200 and $500 tiers
- Highest Codex limits
Business
$25/mo
- Per user
- Shared workspace and admin controls
Enterprise
Contact sales
- Enterprise security
- Flexible usage
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
OpenAI Codex
- Included in ChatGPT plans
- Runs many tasks in parallel
- Open-source CLI
- Token-based limits are hard to predict
- Free tier usage is small
XAML.io
- Runs entirely in the browser
- Standard projects open in Visual Studio
- Mix AI, code and visual editing
- Limited to the .NET and XAML stack
- Homepage gives few details on limits
- Paid plan details unclear
Which one should you choose?
Choose OpenAI Codex if you want:
- Included in ChatGPT plans
- Runs many tasks in parallel
- Open-source CLI
Watch out: token-based limits are hard to predict.
Choose XAML.io if you want:
- Runs entirely in the browser
- Standard projects open in Visual Studio
- Mix AI, code and visual editing
Watch out: limited to the .net and xaml stack.
OpenAI Codex vs XAML.io FAQ
What is the difference between OpenAI Codex and XAML.io?
OpenAI Codex: OpenAI's coding agent in the cloud, CLI, IDE and desktop app. XAML.io: Build .NET apps in the browser with AI, C#/XAML code or a visual designer. Both are coding tools.
Is OpenAI Codex or XAML.io cheaper?
OpenAI Codex starts at $8/mo and XAML.io starts at See pricing page. Check both pricing pages for current plans.
Do OpenAI Codex and XAML.io have free plans?
OpenAI Codex: Yes. XAML.io: Yes.
Who makes OpenAI Codex?
OpenAI Codex is made by OpenAI, based in United States.
Who makes XAML.io?
XAML.io is made by Userware.
Which should I choose, OpenAI Codex or XAML.io?
Choose OpenAI Codex if you value included in chatgpt plans and runs many tasks in parallel. Choose XAML.io if you value runs entirely in the browser and standard projects open in visual studio.