Amazon Lex

Overview of Amazon Lex features, use cases and pricing

Amazon (AWS) Lex is a fully managed artificial intelligence (AI) service with advanced natural language models for building conversational interfaces into applications. Service is predominantly used for Chatbots applications.

How it Works

Amazon Lex Workflow

Use Cases

Amazon Lex is used for Conversational and Chatbot AI applications. Some of the use cases are

  1. Build virtual agents and voice assistants
  2. Automate informational responses
  3. Improve productivity with application bots

Getting Started

Tutorials, Documentation, Hands on Training –

Amazon Lex Pricing

With Amazon Lex, you pay only for what you use. There is no upfront commitment or minimum fee. Pricing for Lex is based upon these two interaction models.

Request and Response Interaction Pricing

With the request and response interaction, each user input is processed as a separate API call. You are charged based on the number of speech or text API requests processed by your bot.

Streaming Conversation Pricing

In a streaming conversation, all user inputs across multiple turns are processed in one streaming API call. The bot continuously listens and can be designed to respond proactively. You are charged based on the number of speech intervals or text requests that take place.

If your application on a daily basis has a Amazon Lex bot which process 5000 speech requests and 2000 text requests, following  is the cost per day

Input requestsCost per requestCost Per Day
5000 speech requests$0.004$20
5000 text requests$0.00075$3.75
Amazon Lex Pricing Calculator

Additional Pricing details found in –

Amazon Lex Chatbot Examples

Building a conversational business intelligence bot with Amazon Lex –

Github Samples –

For more information about other AWS Machine Learning , AI services, check out our post –