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Muxx automatically calculates and tracks the cost of every LLM request, giving you complete visibility into your AI spending.

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How Costs Are Calculated

Costs are calculated based on:
  1. Model - Each model has different pricing
  2. Input tokens - Tokens in your prompt/messages
  3. Output tokens - Tokens in the response
  4. Provider pricing - Current rates from each provider
Cost = (Input Tokens × Input Price) + (Output Tokens × Output Price)

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Pricing Data

Muxx maintains up-to-date pricing for all supported models:
ModelInput (per 1M tokens)Output (per 1M tokens)
gpt-4o$2.50$10.00
gpt-4o-mini$0.15$0.60
claude-3-5-sonnet$3.00$15.00
claude-3-5-haiku$0.80$4.00
gemini-1.5-pro$1.25$5.00
gemini-1.5-flash$0.075$0.30
Pricing is updated regularly to reflect provider changes.

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Viewing Costs

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Per-Request

Every request in the logs shows its cost:
  • Input tokens and cost
  • Output tokens and cost
  • Total cost

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Dashboard Analytics

The dashboard provides cost analytics:
  • Daily/weekly/monthly spend - Track spending over time
  • Cost by model - See which models cost the most
  • Cost by user - If using user metadata
  • Cost by feature - If using feature metadata

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Spend Alerts

Set up alerts to avoid surprise bills:
  1. Go to Settings → Alerts
  2. Click Add Alert
  3. Choose Spend Alert
  4. Set threshold (e.g., $100/day)
  5. Select notification channel

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Spend Caps

Automatically stop requests when spending exceeds a limit:
  1. Go to Settings → Spend Caps
  2. Set a daily or monthly cap
  3. Choose action: Block or Alert Only
When the cap is reached with Block enabled: 
{
  "error": {
    "message": "Spend cap exceeded. Daily limit: $100.00, Current: $100.23",
    "type": "spend_cap_error"
  }
}

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Cost Optimization Tips

GPT-4o-mini is 20x cheaper than GPT-4o for many tasks.
Cached responses are free. Enable caching for repeated queries.
Shorter prompts = fewer input tokens = lower costs.
Limit output length to control output token costs.

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Exporting Cost Data

Export cost data for accounting:
  1. Go to Analytics → Costs
  2. Select date range
  3. Click Export CSV
The export includes per-request costs, model breakdown, and totals.