generated: '2026-09-17'
method: searched
source: https://docs.aws.amazon.com/lexv2/latest/dg/doc-history.html (fetched as markdown from https://docs.aws.amazon.com/lexv2/latest/dg/doc-history.md
  on 2026-09-17)
provider: Amazon Lex
providerId: amazon-lex
url: https://docs.aws.amazon.com/lexv2/latest/dg/doc-history.html
feed: https://docs.aws.amazon.com/lexv2/latest/dg/amazon-lex-release-notes.rss
scheme: dated document history; the API service version (2020-08-07) does not change
current_version: '2020-08-07'
latest_entry: '2025-10-27'
note: Amazon Lex V2 has no separate API changelog — the developer guide Document History IS the change
  record, and it mixes feature launches, AWS managed-policy updates, region expansions and documentation
  edits in one dated table. No entry in the full history is marked breaking, and no operation in the service
  model carries a deprecated trait. The most recent documented change is 2025-10-27; the window below
  is the 25 most recent entries.
entry_count_captured: 25
entry_count_published: 72
entries:
- date: '2025-10-27'
  type: Feature update
  summary: 'Wait and continue is now available in additional locales: ca-ES, de-AT, de-DE, es-419, es-ES,
    es-US, fr-CA, fr-FR, it-IT, ja-JP, ko-KR, pt-BR, pt-PT, zh-CN, zh-HK. For more information, see Enabling
    the Amazon Lex V2 bot to wait for the user to provide more information during a pause.'
  url: https://docs.aws.amazon.com/lexv2/latest/dg/wait-and-continue.html
  breaking: false
- date: '2025-08-18'
  type: Feature update
  summary: AMAZON.Currency and AMAZON.Confirmation built-in slot types now support all locales. For more
    information, see Built-in slot types.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/building-slot-types-built-in.html
  breaking: false
- date: '2025-08-04'
  type: Documentation update
  summary: Updated documentation for Assisted NLU feature with improved examples and clarifications. For
    more information, see Assisted NLU.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/assisted-nlu.html
  breaking: false
- date: '2025-07-03'
  type: New feature
  summary: You can use the AMAZON.BedrockAgentIntent built-in intent to connect your Amazon Lex V2 bot
    with Amazon Bedrock Agents and Knowledge Bases. For more information, see AMAZON.BedrockAgentIntent
    built-in intent.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/building-intents-built-in.html
  breaking: false
- date: '2025-06-24'
  type: Update to AWS managed policy
  summary: Amazon Lex V2 updated the policy to allow replication of tags and ResourceBasedPolicy when
    using global resiliency see AmazonLexReplicationPolicy.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/security-iam-awsmanpol.html#security-iam-awsmanpol-AmazonLexReplicationPolicy
  breaking: false
- date: '2025-06-11'
  type: New feature
  summary: You can now use Assisted NLU to improve intent classification and slot resolution in Amazon
    Lex V2. This feature uses Large Language Models (LLMs) to enhance accuracy while staying within your
    bot's configured intents and slots. For more information, see Assisted NLU.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/assisted-nlu.html
  breaking: false
- date: '2025-06-03'
  type: Update to feature (2025-06-03)
  summary: You can use 17 new languages with your custom vocabularies in Amazon Lex V2. For more information,
    see Custom vocabularies.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/vocab.html
  breaking: false
- date: '2024-12-01'
  type: New feature (2024-12-01)
  summary: You can use the QinConnect built-in intent to connect your Amazon Lex V2 bot with Amazon Connect.
    For more information, see QinConnect built-in intent.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/building-intents-built-in.html
  breaking: false
- date: '2024-10-01'
  type: New feature (2024-10-01)
  summary: You can use AMAZON.Currency built-in slot for US and Spanish locales in Amazon Lex V2. For
    more information, see AMAZON.Currency.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/built-in-slot-currency.html
  breaking: false
- date: '2024-07-26'
  type: Update to feature (2024-07-26)
  summary: The QnA built-in intent for generative AI now supports Bedrock Knowledge Base and Guardrails
    in Amazon Lex V2. For more information, see AMAZON.QnAIntent.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/built-in-intent-qna.html
  breaking: false
- date: '2024-07-10'
  type: Update to feature (2024-07-10)
  summary: The QnA built-in intent for generative AI now supports Anthropic Claude 3 Haiku and Anthropic
    Claude 3 Sonnet models in Amazon Lex V2. For more information, see Optimize bot creation and performance
    with generative AI.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/generative-features.html
  breaking: false
- date: '2024-05-10'
  type: Update to AWS managed policy (2024-05-10)
  summary: Amazon Lex V2 added new permissions to the AmazonLexReadOnly managed policy to allow read access
    to bot resources that have been replicated in other regions.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/security-iam-awsmanpol.html#security-iam-awsmanpol-AmazonLexReadOnly
  breaking: false
- date: '2024-04-15'
  type: Update to AWS managed policy (2024-04-15)
  summary: Amazon Lex V2 added new permissions to the AmazonLexFullAccess managed policy to allow updating
    of replicated bot resources to other regions.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/security-iam-awsmanpol.html#security-iam-awsmanpol-AmazonLexFullAccess
  breaking: false
- date: '2024-03-22'
  type: Region expansion
  summary: Amazon Lex V2 is now available in AWS GovCloud (US-West) (us-gov-west-1).
  url: https://docs.aws.amazon.com/general/latest/gr/lex.html
  breaking: false
- date: '2024-03-07'
  type: Update to AWS managed policy (2024-03-07)
  summary: Amazon Lex V2 added new permissions to the AmazonLexReplicationPolicy managed policy to allow
    updating of replicated bot resources to other regions.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/security-iam-awsmanpol.html#security-iam-awsmanpol-AmazonLexReplicationPolicy
  breaking: false
- date: '2024-03-04'
  type: New function
  summary: You can use fn.LENGTH() function to determine the value length of a string value in Amazon
    Lex V2. For more information, see Conditional branching - Functions.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/paths-branching.html#branching-function
  breaking: false
- date: '2024-02-28'
  type: Update to feature (2024-02-28)
  summary: The QnA built-in slot for generative AI capabilities in Amazon Lex V2 is now GA. For more information,
    see Optimize bot creation and performance with generative AI.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/generative-features.html
  breaking: false
- date: '2024-02-08'
  type: Update to AWS managed policy (2024-02-08)
  summary: Amazon Lex V2 added new permissions to the AmazonLexFullAccess managed policy to allow replication
    of bot resources to other regions.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/security-iam-awsmanpol.html#security-iam-awsmanpol-AmazonLexFullAccess
  breaking: false
- date: '2024-02-08'
  type: New managed policy
  summary: Amazon Lex V2 added a managed policy providing permissions to replicate bot resources in other
    regions. For more information, see AmazonLexReplicationPolicy.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/security-iam-awsmanpol.html#security-iam-awsmanpol-updates
  breaking: false
- date: '2024-02-08'
  type: New feature (2024-02-08)
  summary: You can use Global resiliency to replicate your bot in a second AWS region in Amazon Lex V2.
    For more information, see Global resiliency.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/global-resiliency.html
  breaking: false
- date: '2023-11-29'
  type: New feature (2023-11-29)
  summary: You can now take advantage of generative AI capabilities in Amazon Lex V2. For more information,
    see Optimize bot creation and performance with generative AI.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/generative-features.html
  breaking: false
- date: '2023-11-08'
  type: New feature (2023-11-08)
  summary: Amazon Lex V2 can now use selective logging to capture text and/or audio at the intent or slot
    level. For more information, see Selective logging.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/monitoring-selective-logging.html
  breaking: false
- date: '2023-08-17'
  type: New feature (2023-08-17)
  summary: Amazon Lex V2 can now use a built-in slot to determine Yes/No/Maybe/Don't know responses using
    `AMAZON.Confirmation`. For more information, see Built-in Slot Types.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/built-in-slots.html
  breaking: false
- date: '2023-07-18'
  type: New feature (2023-07-18)
  summary: You can view the performance metrics of intents and slots, in addition to other conversational
    metrics using the analytics dashboard. For more information, see Analytics.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/analytics.html
  breaking: false
- date: '2023-06-06'
  type: New feature (2023-06-06)
  summary: You can improve the accuracy and fulfillment success of your bot with the Test Workbench. For
    more information, see Test Workbench.
  url: https://docs.aws.amazon.com/lexv2/latest/dg/test-workbench.html
  breaking: false