Pricing for AWS Bedrock knowledge bases

Hello.

There is no charge for the Bedrock knowledge bases feature itself, but there is a charge for the AI ​​models and vector databases used.
AI model pricing is listed in the document below.
https://aws.amazon.com/bedrock/pricing/?nc1=h_ls

In your case, I think you are using OpenSearch Serverless, which is created together with the knowledge base, so you should check the price list in the document below.
https://aws.amazon.com/opensearch-service/pricing/?nc1=h_ls#Amazon_OpenSearch_Serverless

Hi,

Documentation says clearly: "When using Agents for Amazon Bedrock and Knowledge Bases for Amazon Bedrock, you are only charged for the models and the vector databases you use with these capabilities"

See https://aws.amazon.com/bedrock/pricing/?nc1=h_ls to confirm.

So, you have to select a vector store based on the list you see at https://docs.aws.amazon.com/bedrock/latest/userguide/knowledge-base-setup.html

The usual cost of vector stores has 2 components: size of vector data + number of requests to the store

Then, you also have to select an LLM among the supported ones on Bedrock: see https://docs.aws.amazon.com/bedrock/latest/userguide/knowledge-base-supported.html Each of these models have different costs: see https://aws.amazon.com/bedrock/pricing/?nc1=h_ls

The cost of your setup will be the sum of cost of vector store + cost of LLM inferences

To estimate cost of inferences, you can obtain the number of input and output tokens in the response metadata returned by the LLM: so, make some trials with representative queries of your future queries to compute how much they will cost in aggregate.

Best,

Didier