Costs
API spend across providers · May 2026 month-to-date
Total spend MTD
$142.00
Avg / book
$17.84
Projected month
$210
Margin estimate
76%
Spend by model
Gemini Nano Banana Pro$84.20 · 1240 calls
Gemini Nano Banana Flash$28.40 · 3120 calls
Claude Sonnet 4.5 (review)$18.60 · 2100 calls
Claude Sonnet 4.5 (listing)$6.20 · 48 calls
Claude Haiku (market)$4.60 · 320 calls
Spend by book
Whimsical Forest Friends$18.40
Mandala Meditations Vol. 3$22.10
Tiny Dinosaur Adventures$14.20
Cozy Cottages of Europe$19.80
Underwater Mermaid Kingdom$6.20
Halloween Spooky Cute$21.00
Vintage Floral Patterns$17.50
Monthly projection
At current pace, May spend will land near $210. With projected royalty of $1,950, you'll net roughly $1,740 (89% margin) after API costs but before KDP printing fees.