Changes Amazon Lex now supports base64-encoded message and input transcript fields.
Changes Amazon Lex now supports the ability to view and manage active contexts associated with a user session.
Changes Amazon Lex supports intent classification confidence scores along with a list of the top five intents.
Changes Amazon Lex adds "sessionId" attribute to the PostText and PostContent response.
Changes Amazon Lex now supports Sentiment Analysis
Changes Amazon Lex now supports Session API checkpoints
Changes Manage Amazon Lex session state using APIs on the client
Changes You can now define a response for your Amazon Lex chatbot directly from the AWS console. A response consists of messages dynamically selected from a group of pre-defined messages, populated by the developer.