# 9) Pricing Comprehend

Pricing Comprehend

Comprehend custom model training is not covered under free-tier.  So, you will incur a charge of USD 2-3 for the labs in the next two lectures.  There is also a 50 cents per month maintenance charge for trained models

<https://aws.amazon.com/comprehend/pricing/>

"**Custom Comprehend**: The Custom Classification and Entities APIs can train a custom NLP model to categorize text and extract custom entities. Asynchronous inference requests are measured in units of 100 characters, with a 3 unit (300 character) minimum charge per request. You are charged $3 per hour for model training (billed by the second) and $0.50 per month for custom model management. For synchronous Custom Classification and Entities inference requests, you provision an endpoint with the appropriate throughput. You are charged from the time that you start your endpoint until it is deleted."


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