First 1,000 units per feature each month free · Label Detection: $1.50 per 1,000 units for 1,001–5,000,000; $1.00 thereafter · Text and Document Text Detection: $1.50 per 1,000 units for 1,001–5,000,000; $0.60 thereafter · Web Detection: $3.50 per 1,000 units for 1,001–5,000,000; contact Google for higher tier