Billing & Credits

Understand how Lux usage is billed and manage your credits.

Credit System

Lux uses a credit system for usage-based billing. Credits are consumed when you:

• Run AI models (Claude, GPT)
• Send emails
• Send SMS messages
• Make voice calls
• Use voice synthesis

Credit Consumption

AI Models

Communication

Checking Balance

Via Lux Studio

Navigate to Settings → Billing to see:

• Current credit balance
• Usage history
• Spending breakdown

Via CLI

lux credits

Usage Monitoring

Per-Flow Costs

Each flow execution logs credit usage:

{
  "flowId": "flow_123",
  "executionId": "exec_456",
  "credits": {
    "ai": 12,
    "email": 1,
    "total": 13
  }
}

Usage Reports

View usage in Settings:

• Daily/weekly/monthly breakdown
• By flow
• By integration type

Managing Costs

Cost Optimization Tips

1. Use appropriate models

   • Use Haiku for simple tasks
   • Reserve Opus for complex reasoning

2. Optimize prompts

   • Shorter prompts = fewer tokens
   • Cache repeated operations

3. Batch operations

   • Combine multiple small operations
   • Use bulk APIs where available

4. Monitor usage

   • Set up alerts for high usage
   • Review flow efficiency regularly

Setting Limits

Configure spending limits:

1. Go to Settings → Billing
2. Set monthly credit limit
3. Enable notifications at thresholds

Purchasing Credits

Via Lux Studio

1. Navigate to Settings → Billing
2. Click Add Credits
3. Select amount
4. Complete payment

Plans

Billing History

View past invoices and credit purchases:

1. Go to Settings → Billing
2. Click History
3. Download invoices as needed

Organization Billing

For organizations:

• Single billing account for all members
• Admin controls spending limits
• Usage attributed to flows/users
• Consolidated invoicing

Free Tier

New accounts include:

• 1,000 free credits
• Basic features
• Community support

No credit card required to start.

FAQ

What happens when credits run out?

• Flows pause execution
• You receive notification
• Add credits to resume

Do credits expire?

• Purchased credits don't expire
• Monthly allotments reset each billing cycle

Can I get a refund?

• Unused purchased credits can be refunded within 30 days
• Contact support for assistance

How do I estimate costs?

Use the cost calculator in Settings, or:

Estimated monthly cost =
  (AI calls × tokens × model rate) +
  (Emails × 1) +
  (SMS × 2) +
  (Voice minutes × 5)

See Also:

• Credentials
• Integrations