Plans & Usage
EngineForge uses an AI budget system for AI features. The IDE itself is free to download and use. AI chat, code generation, and Code mode draw from your AI budget.
Early Access Plan
| Feature | Early Access |
|---|---|
| AI budget included | $20 |
| Model choice | Sonnet 4.6, Sonnet 4.5, Sonnet 4, Haiku 4.5 |
| Unity Editor Bridge | Included |
| Godot Editor Bridge | Included |
| Ask & Code modes | Included |
| Budget top-ups | $5 / $15 / $20 |
| When budget runs out | Blocked until topped up |
How your AI budget works
What uses budget
Each AI message costs a small amount from your budget based on its length and complexity. Both your prompt and the AI's response count toward your budget. Longer conversations and Code mode naturally use more budget.
Choosing your model
You can choose between four Claude models for each conversation. Sonnet 4.6 is the most capable, ideal for complex multi-step tasks and large codebases. Haiku 4.5 is the fastest and most affordable, great for quick questions and simple edits. Picking the right model for the job helps you stretch your budget further.
Budget top-ups
You can purchase additional AI budget at any time. Top-ups add directly to your remaining budget: $5, $15, or $20. Top-up budget never expires, even if you cancel your subscription.
Usage priority
- Your plan budget is used first
- When plan budget runs out, top-up budget is used
- When all budget is exhausted, usage is blocked until you top up
AI models
| Model | Context | Best for |
|---|---|---|
| Claude Sonnet 4.6 | 1M tokens | Most capable. Complex multi-step tasks, large codebases, complete game systems. Recommended for most tasks. |
| Claude Sonnet 4.5 | 200K tokens | Previous generation. Fast and capable for most coding tasks. |
| Claude Sonnet 4 | 200K tokens | Previous generation. Fast and capable for most coding tasks. |
| Claude Haiku 4.5 | 200K tokens | Fastest and most affordable. Great for quick questions, small edits, and simple tasks. |
What's included without AI budget
Only AI chat and code generation require budget. Everything else in the IDE works without it:
- Full code editor with syntax highlighting, IntelliSense, and debugging
- Integrated terminal, file explorer, source control, and extensions
- Code Graph project indexing and analysis
- Asset Store browsing and downloads
Billing
Subscription
Early Access is currently free and includes $20 of AI budget. When paid plans launch, subscriptions will be billed monthly via PayPal. You can upgrade, downgrade, or cancel from the dashboard at any time.
Top-ups
Top-up purchases are one-time payments processed via PayPal Checkout. Budget is added to your account immediately after payment.
Authentication
Sign in with GitHub or Google. Your account is shared between the IDE and the website. Sign in once and your usage syncs across both.
The IDE uses a secure OAuth flow:
- IDE opens your browser to the login page
- You sign in with GitHub or Google
- The browser redirects back to the IDE with a secure token
- The IDE stores the token and uses it for all API requests