Pricing
Start free. Build more when you need it.
Every plan includes the whole platform. Pick one for how much you build and the models you want to build with.
Free
Build your first app and see what MonstarX can do.
$0/month
- Enough usage to build and publish a small app
- The same models as the paid plans
- Usage that resets every 5 hours and every week
Plus
For building and improving an app every week.
$15/month
- Room to build and iterate every week
- Every standard model
- A weekly taste of premium models
Pro
For people who build with MonstarX most days.
$50/month
- 5× the usage of Plus
- Premium models for all of your usage
- Long build sessions without waiting
Ultra
For shipping apps every day, on the best models.
$100/month
- 10× the usage of Plus
- The most premium model usage
- Build all day, every day
Every plan includes
- Live cloud previews while the app is built
- Database, accounts, email, file storage and AI for every app
- Publishing to your own monstarx.app address
- Custom domains
- Save to GitHub
- Automated QA in a real browser
- Build, plan and chat modes
01Compare
Every plan builds the whole app.
The plans differ in how much you can build and which models you can build with — never in what your apps can do.
| Plan | Free$0/month | Plus$15/month | Pro$50/month | Ultra$100/month |
|---|---|---|---|---|
| UsageIn the 5-hour and weekly limits | Starter | 1× | 5× Plus | 10× Plus |
| Lower cost and standard modelsGPT-6 Luna, GPT-6 Luna Pro, GLM 5.3 Flash, DeepSeek V4.1 Flash, DeepSeek V4 Pro, GLM 5.3, Kimi K2.7 Code, Gemini 3.8 Flash, Muse Spark 1.3, Grok 4.7, Claude Haiku 4.5, Qwen 3.8 Max, Claude Sonnet 5, GPT-6 Sol, GPT-6 Sol Pro, GPT-5.6 Terra, Kimi K3 | ||||
| Premium modelsClaude Opus 5.5, Claude Fable 5, GPT Astra | Weekly taste | All usage | All usage | |
| Live cloud previews and version history | ||||
| Database, accounts, email, storage and AI in your apps | ||||
| Publishing and custom domains | ||||
| Automated QA in a real browser | ||||
| Save to GitHub and export the code |
02How usage works
Clear limits, no surprises.
MonstarX measures the AI work behind every request, the same way the best AI tools do.
Usage follows the work
A quick question uses a little; building a whole app uses more. Bigger requests and more capable models draw more from your limits.
Two limits, each on a schedule
Usage counts toward a 5-hour session and the week. There is no daily or monthly usage limit. When one runs out, new requests wait for it to reset.
Premium models
Claude Opus 5.5, Claude Fable 5, GPT Astra have a weekly allowance: a taste on Plus, all of your usage on Pro and Ultra.
Always in view
A usage indicator sits next to the prompt box, and Settings shows every limit, when it resets and what used it.
03Questions
Plans, plainly.
What people ask before they pick a plan.
How does usage work?
Every request uses some of your plan’s usage, depending on how much work it takes and which model does it. Usage is counted over a 5-hour session and a week, with no daily or monthly usage limit; when one runs out, new requests wait until it resets. The indicator next to the prompt box always shows where you are.
Which models are premium?
The most expensive models to run: Claude Opus 5.5, Claude Fable 5, GPT Astra. Plus includes a small weekly allowance to try them; on Pro and Ultra premium models can use all of your usage.
What happens when I reach a limit?
MonstarX finishes the step it is on and stops the request cleanly, so nothing is lost. Continue when the limit resets — the usage panel shows exactly when — or upgrade and carry on right away.
Can I change or cancel my plan?
Yes. Upgrades apply straight away and you pay the prorated difference. Cancel any time from Settings → Manage billing; your plan stays active until the end of the billing period.
Does unused usage roll over?
No. The 5-hour limit resets 5 hours after a session starts, and the weekly limit resets every Monday at 00:00 UTC.
Do the apps I build cost extra?
No. The database, accounts, email and file storage in your apps are included with every plan. When a published app uses AI, that work draws on your plan’s usage like your own requests, within each app’s daily limits.
How do I pay?
By card, securely through Stripe. Prices are in US dollars and billed monthly.