Cost Tracking Reference

Load this on-demand when the user asks about costs or before batch operations.

Pricing Source

Pricing is not hard-coded. Check current Google pricing before estimating: https://ai.google.dev/gemini-api/docs/pricing

Store dated pricing in ~/.banana/pricing.json before using cost commands:

{
  "source": "https://ai.google.dev/gemini-api/docs/pricing",
  "checked_date": "YYYY-MM-DD",
  "models": {
    "MODEL_ID": {
      "1K": null
    }
  }
}

Replace null with the checked USD cost before running estimates. Treat all estimates as approximate.

Free Tier Limits

Verify current limits in Google AI Studio before batch operations.

Cost Tracker Commands

# Log a generation
cost_tracker.py log --model "$NANOBANANA_MODEL" --resolution 1K --prompt "coffee shop hero"

# View summary (total + last 7 days)
cost_tracker.py summary

# Today's usage
cost_tracker.py today

# Estimate before batch
cost_tracker.py estimate --model "$NANOBANANA_MODEL" --resolution 1K --count 10

# Reset ledger
cost_tracker.py reset --confirm

Storage

Ledger stored at ~/.banana/costs.json. Created automatically on first use.