Dialogflow release notes

A Missing Authorization vulnerability in the playbook import functionality in Dialogflow CX on Google Cloud Platform allows an authenticated user with specific roles to escalate privileges and potentially take over a project using a maliciously crafted playbook import. This vulnerability was patched on 15 March 2026, and no customer action is needed.

Conversational Agents (Dialogflow CX): New Responsible AI fields are now available for the v3 and v3beta1 API endpoints. Responsible AI allows you to flag, filter or block harmful content.

Conversational Agents (Dialogflow CX): Dialogflow CX Messenger integration contained a vulnerability that allowed for authentication bypass when an agent was configured to use an authenticated API with a 3rd party identity. All versions released after August 20th, 2025 have been updated to protect from this vulnerability. No user action is required.

Conversational Agents (Dialogflow CX): Conversational Agents now supports log splitting for large Cloud Logging log entries.

Conversational Agents (Dialogflow CX): Regular expression validation (Regex) is now available in Agent Settings and Entity Types.

Conversational Agents (Dialogflow CX):You can now specify custom voice in the Conversation profiles menu in the console.

Conversational Agents (Dialogflow CX): You can now configure service account authorization for both tools and webhooks. See the reference documentation for details.

Conversational Agents (Dialogflow CX): New fields temperature, input_token_limit and output_token_limit are now available for LlmModelSettings in the v3beta1 API. This allows you to adjust the model per playbook.

Conversational Agents (Dialogflow CX):The Block none safety feature in agent settings is no longer restricted access.

Conversational Agents (Dialogflow CX): The Entity Types console menu now allows you to set a page size for entity entries and excluded phrases. Pagination options are automatically displayed if there are more than 10 items listed.

Dialogflow CX (Conversational Agents): The default models for data stores and playbooks have been upgraded as follows:

• Data stores

  • Default voice mode summarization from gemini-2.0-flash-lite-001 to gemini-2.5-flash-lite.
  • Default text mode summarization from gemini-2.0-flash-001 to gemini-2.5-flash.
  • Default text mode rewriter from gemini-2.0-flash-lite-001 to gemini-2.5-flash-lite.

• Playbooks:

  • All newly-created playbooks use default model gemini-2.5-flash.

Dialogflow CX (Conversational Agents): The Dialogflow CX console will be deprecated on October 31, 2025. After that date all users will be automatically routed to the Conversational Agents console.

Dialogflow CX (Conversational Agents): This is a correction of the release note posted on August 7, 2025. All deactivated models are now automatically upgraded to model gemini- 2.5-flash with the exception of generative fallback, which is automatically upgraded to gemini-2.5-flash-lite.

Dialogflow CX (Conversational Agents): The following regions are now available:

• asia-southeast2
• europe-west4
• europe-west6

Dialogflow CX (Conversational Agents) The model gemini-2.5-flash-lite is now available in all regions, and gemini-2.5-flash is now GA. These changes apply to the following features:

• Generators
• Playbooks
• Data store tools

Dialogflow CX (Conversational Agents): New prompt security controls are available in agent settings. See the agent settings documentation for details.

Dialogflow CX and Vertex AI: The gemini-1.0-pro, gemini-1.5-pro and gemini-1.5-flash models will be deprecated on September 1, 2025 and automatically upgraded to the gemini-2.0-flash-001 model. This change applies to Vertex AI agents and the following Conversational Agents generative features:

• Playbooks
• Data stores
• Generators
• Generative Fallback

After the upgrade on September 1, 2025, gemini-2.0-flash-001 will be automatically selected in the console. We recommend that you upgrade to the new model early to allow enough time for testing and to ensure that your solution works as intended.

Conversational Agents: Routine playbooks are now generally available.

Conversational Agents: Parameter passing is now available and documented between routine playbooks, task playbooks, and flows.

Conversational Agents: 21 new Chirp 3 HD voices are now available across 34 locales.

Conversational Agents data stores: Conversational Agents now supports AlloyDB AI, Bigtable, Firestore, Spanner and Cloud SQL data store source as public GA features; Microsoft Entra ID source has now private GA support. See the data store documentation for a complete list.

Conversational Agents: CMEK is now available in EU regions.

Conversational Agents: The conversational history flow analysis feature is now available.

Conversational Agents: The model gemini-2.5-flash is now available in all regions. This change applies to the following features:

• Generators
• Playbooks (Public Preview)
• Data stores tools (Public Preview)

Conversational Agents data stores: You can now create some data store types directly within the Conversational Agents console rather than needing to use AI Applications. See the data store creation documentation for details.

Conversational Agents data stores: Conversational Agents now supports AlloyDB, Bigtable, Firestore, Spanner and Cloud SQL data store sources as public GA features. Microsoft Entra ID source has now private GA support.

Conversational Agents: New Chirp 3 HD Cloud Text-to-Speech voice Autonoe is now available.

Conversational Agents: Conversational Agents console now supports test cases.

Data store handlers: Data store handler use tracking for billing purposes has been corrected.

Conversational Agents: Service agent access tokens used for authentication by both webhooks and tools are now discontinued as mentioned in notification emails to customers earlier this year. Most customers can use service accounts instead.

Dialogflow CX (Conversational Agents): Models gemini-2.0-flash-001 and gemini-2.0-flash-lite-001 are now GA. They are available in all supported regions.

This change applies to the following features:

• Playbooks
• Data store tools in playbooks
• Generators

Dialogflow CX (Conversational Agents): You can now create personalized voice models with voice cloning.

Dialogflow CX (Conversational Agents): You can now use the console to test your tools.

Dialogflow CX (Conversational Agents): You can now use code blocks to get better control over playbooks.

Dialogflow CX (Conversational Agents): Data store tools no longer require the use of a playbook and can be used with any agent. For information about configuring data store tools for a flow-based agent, see the data store tools documentation.

Dialogflow CX (Conversational Agents): The gemini-1.0-pro model is deprecated as of March 24, 2025 and has been automatically upgraded to the gemini-1.5-flash-001 model. This change applies to the following features:

• Playbooks
• Data stores
• Generators

Dialogflow CX (Conversational Agents): AI generation of language-specific information, entities and training phrases is now GA.

Dialogflow CX (Conversational Agents): All prebuilt agents are now GA.

Dialogflow CX (Conversational Agents) data stores: Dialogflow now supports additional native and third-party data store sources as a private GA feature. For a list of data store sources, integration instructions, and the request form to be added to the allowlist, see the data stores documentation.

Dialogflow CX (Conversational Agents) data store handlers: The method of adding data store handlers to an agent has been streamlined. You are no longer required to create a Chat app on Agent Builder. For updated implementation instructions, see the data stores tools documentation.

The Conversational Agents console is now generally available (GA). This console combines the power of Generative AI playbooks and data stores with deterministic flows. Additional features:

• The console is now hosted at https://conversational-agents.cloud.google.com/.
• There is a new menu option for managing languages. Selecting Manage languages from the language drop-down menu at the top of the console now automatically redirects you to the Agent Settings language management section in the Deterministic Flows tab.
• The simulator now has feature parity with the Dialogflow CX console.

Conversational Agents: Conversational Agents now supports multiple tool versions in addition to playbooks and flows. See the versions and environments documentation for details.

Conversational Agents playbooks: Playbooks now support 38 languages. Playbook language support is displayed on the language support page. Supported languages have been tested for quality with the gemini-2.0-flash-001 and gemini-1.5-flash-002 models.

Conversational Agents: New Chirp 3 HD Cloud Text-to-Speech voices are now available.

Conversational Agents playbooks: New model gemini-2.0-flash (Preview) is now available. For more information and supported regions, see Model support.

Conversational Agents: You can now toggle a Show latency option in the Conversational Agents Console simulator to view latency per conversation turn for simulator conversations. To view latency breakdown, click the total latency value for the conversation turn. Latency values are also shown in the original response, Cloud logging, and BigQuery export.

Be aware that latency values are not recorded directly in the logs, but are represented as startTime and completeTime values in the traceBlocks field.

Conversational Agents playbooks: You can now enable DTMF in playbook Settings and as a conditional actions as a Preview feature. See the playbook settings and DTMF for telephony integrations pages for more information.

Dialogflow CX (Conversational Agents): Customer-managed encryption keys (CMEK) is now a GA feature.

Dialogflow CX (Conversational Agents) data store handlers: Model gemini-2.0-flash-lite-001 is now a Preview feature available in the following regions: global, us, us-central1, us-east1, us-west1, europe-west1, europe-west4.

Dialogflow CX (Conversational Agents) generators: Model gemini-2.0-flash-001 is now a GA feature available in the following regions: global, us, us-central1, us-east1, us-west1, europe-west1, europe-west4.

Dialogflow CX (Conversational Agents): The Conversational Agents console has moved to a new location.

Dialogflow CX (Conversational Agents): You can now use the console search feature to search for all resources, including playbooks, examples, and tools.

Dialogflow CX (Conversational Agents): Playbooks now support the following new features:

• Two different playbook types: Task playbooks and routine playbooks.
• Connector tools.
• Conditional actions.
• DTMF.

Dialogflow CX (Conversational Agents): You can now use the Conversational Agents console to manage languages.

Dialogflow CX (Conversational Agents) data store handlers: New model gemini-2.0-flash-001 is now available to data store handlers as a Preview feature. This launch is limited to the following regions: global, us, us-central1, us-east1, us-west1, europe-west1, europe-west4.

Dialogflow CX (Conversational Agents): Text-to-speech used by Dialogflow now supports new Chirp 3 HD voices.

Dialogflow CX (Conversational Agents): Git export/restore now supports additional Git providers and Google Secrets for token storage.

Dialogflow CX (Conversational Agents): Text-to-speech used by Dialogflow now supports new Chirp HD voices.

Dialogflow CX (Conversational Agents) & ES: Text-to-speech removed support for voices across European markets. Affected users were sent an email announcement.

Conversational Agents (CX), ES & Agent Assist: Starting February 24, 2025, a limit of 5 phone numbers per project will be enforced. This limit doesn't apply to the global region. For instructions on deleting unused phone numbers and resolving the limit issue, see the RESOURCE_EXHAUSTED troubleshooting section. If you have a business requirement to increase the limit, request to increase the Phone numbers quota specifying the region and providing detailed justification for your request.

The Conversational Agents console has launched for preview to create agents that can use a combination of generative and deterministic features. See how we intend on migrating to this new console.

Dialogflow CX (Conversational Agents): Dialogflow CX has launched a new feature that allows you to auto-generate and auto-translate Intent training phrases, Entity synonyms, and Fulfillment phrases in the language of your choice. See the documentation for details.

Dialogflow CX (Conversational Agents): You can now require a full match for banned phrases in addition to a partial match. If enabled, a full match requires the input to be matched exactly in order to trigger a ban. For more information about setting banned phrases, see the documentation.

Dialogflow CX (Conversational Agents): Service directory support is now enabled for flexible webhooks. See the webhooks documentation for details.

Dialogflow CX (Conversational Agents): You can now set either a partial match or a full match to banned phrases. This setting applies to playbooks, datastores, and generators. You can enable and test this feature in Agent Settings > Generative AI > Banned phrases > Match requirements.

Dialogflow CX data stores: The following languages are now GA. See the language support page for details.

• Arabic
• Bengali
• Bulgarian
• Chinese Simplified
• Chinese Traditional
• Croatian
• Czech
• Estonian
• Finnish
• Hebrew
• Hungarian
• Japanese
• Korean
• Latvian
• Lithuanian
• Norwegian
• Polish
• Romanian
• Russian
• Serbian
• Slovak
• Slovenian
• Swahili
• Thai
• Turkish
• Ukrainian
• Vietnamese

Dialogflow CX: You can now configure an access token name in Dialogflow Messenger to store the end user's authentication when they sign in, and then use it as the bearer token for tool authentication. See the Dialogflow Messenger documentation for more information about enabling this feature.

Dialogflow CX: New feature Context token limits has been added to Agent Settings > Generative AI. You can use this feature to set a percentage of the token budget to be reserved for conversation history, as a maximum. See the Agent Settings documentation for details.

Data store tools: You can now optimize the RAG performance of data store tools used by Playbooks. See the documentation for details.

Generators and data store handlers: The model gemini-1.5-flash-002 is now GA.

Data store handlers: The default generative model has been changed to gemini-1.5-flash-001.

Dialogflow CX: As of August 2024, us-dialogflow.* has been re-introduced as the canonical endpoint for the US multi-region. The usa-dialogflow.* endpoint is still supported as an alias. See the regionalization documentation for details.

Dialogflow CX & ES: In order to increase the stability of Cloud Text-to-speech, out-of-quota requests for Journey Voices will now be fulfilled with a fallback voice of the same speaker persona. To opt out, contact your Google account team.

Dialogflow CX & ES: Dialogflow now supports A-law encoding in addition to Mu-law encoding for input and output audio. A-law and Mu-law are the two available formats in G.711.

Conversational Agents: The gemini-1.5-flash-001 model is generally available (GA) for data store handlers as of August 20, 2024. The gemini-1.5-flash-002 model remains public Preview.

Starting in late 2024 and ending in early 2025, there will be changes to some Dialogflow product names, feature names, and consoles. See the documentation for complete details.

Dialogflow CX: You can now enable security checks to prevent prompt injection attacks. See the documentation for details.

Dialogflow CX: Cloud Text-to-Speech europe-west1 and europe-west3 regions for Neural2 voices now use corresponding regions.

Dialogflow CX & ES: Text-to-speech Journey Voices now supports MULAW output audio_encoding (CX, ES) in addition to LINEAR16. Future updates to Journey Voices will appear in the Cloud Text-to-Speech documentation.

Dialogflow CX and Vertex AI: The text-bison@002, text-bison and code-bison models will be deprecated on October 21, 2024 and automatically upgraded to the gemini-1.5-flash-001 model. This change applies to Vertex AI agents and the following Dialogflow CX Generative Features:

• Vertex AI agent apps
• Data store agents (also known as Chat agents)
• Generators

After the upgrade on October 21, 2024, gemini-1.5-flash-001 will be automatically selected in the console. We recommend that you upgrade to the new model early to allow enough time for testing and to ensure that your solution works as intended.

Dialogflow CX: Cloud Text-to-Speech europe-west1 and europe-west3 regions for Neural2 voices will temporarily use the eu multi-region instead.

Dialogflow CX and Vertex AI Agents: Generative features will migrate to the gemini-1.5-flash-001 model on September 30, 2024. See the email notification.

Dialogflow CX & ES: Text-to-Speech Journey Voices will get an update in the week of Sept 3. If you select a journey voice in your agent Text-to-Speech settings (CX, ES), only LINEAR16 output audio_encoding (CX, ES) will be supported starting from Sept 3. This model update will also include slight variations in pauses, tone, and so on of the synthesized journey voices.

Dialogflow CX: You can now configure sensitivity levels of safety filters with respect to different Responsible AI (RAI) categories.

Vertex AI Agents: OpenAPI tool authentication now supports custom client certificates for mutual TLS authentication.

Dialogflow CX: You can now enable consent-based end-user content redaction. If this setting is enabled, it lets you use a special session parameter to control whether end-user input and parameters are redacted from conversation history and Cloud logging. See the agent settings documentation for details.

Dialogflow CX: Dialogflow now uses corresponding Cloud Text-to-Speech regions for Neural2 voices.

The status of the Dialogflow Speech-to-Text model migrations has changed:

• The Dialogflow speech model migration initially announced in December 2023 and later postponed to the new dates has been placed on hold until further notice (no ETA). For more information, see the migration documentation for Dialogflow CX and Dialogflow ES.

• The Dialogflow phone_call speech model migration announced in March 2024 has been partially completed. The remaining migration parts have been placed on hold until further notice (no ETA). For more information, see the migration documentation for Dialogflow CX and Dialogflow ES.

Vertex AI Agents: Agent apps now provide generative settings for input token limit, output token limit, and temperature.

Dialogflow ES: As of May 27 2024, Twilio no longer supports integrations with Dialogflow ES. For more details and information about migrating to Dialogflow CX, see the Twilio documentation.

Dialogflow CX: The gemini-1.5-flash generative model is now available for the generators feature.

Vertex AI Agents: The following new regions are supported by agent apps:

• europe-west1
• europe-west2
• europe-west3
• northamerica-northeast1
• us-west1

The following was incorrectly announced: Dialogflow CX: The gemini-1.5-flash generative model is now available for the generators feature.

Data store agents: You can now run self-service evaluation which will assess the quality of your data store agent and recommend changes.

All generative features: It was announced previously that the text-bison@001 model will be deprecated. In addition, the code-bison@001 model and fine-tuned text-bison@001 options will be deprecated. This deprecation will happen mid June. The deprecated models will be updated to gemini-1.0-pro-001, as previously announced. For more information, see the email announcement.

Dialogflow CX now offers custom webhook templates for integration with Salesforce. See the webhooks documentation for details.

Data store agents: The gemini-1.5-flash generative model is now available for selection in the console.

Dialogflow CX: You can now integrate with Soul Machines to create 3-D avatars.

Vertex AI Agents: OpenAPI tool authentication now supports Bearer Token.

Dialogflow CX: VPC Service Controls now support Cloud Functions and Cloud Run.

Vertex AI Agents: OpenAPI tools now support private network access

Dialogflow ES and Dialogflow CX: The us-dialogflow.googleapis.com endpoint and locations/us resource location, which served as aliases for global resources, will be discontinued starting May 21, 2024. We have changed the date to update resource locations and endpoints from April 16, 2024 to May 21, 2024 to provide you with additional time. For more information, see the email announcement.

Note

• This change affects only the agents created in the global region (ES, CX) and only if you use the us alias in the API requests to these global-region agents. If you created agents in us-central1, us-east1, us-west1, and us (multi-region) regions, no action is required.
• The discontinued endpoint is different than the us multi-region endpoint that was announced recently.

Dialogflow CX and Vertex AI Agents: Effective June 15, 2024, the following generative features will be upgraded from text-bison-001 and fine-tuned text-bison@001 options to gemini-1.0-pro-001:

• Vertex AI agent apps
• Data store agents (aka Chat agents)
• Generators
• Generative fallback

For more information, see the email announcement

Data store agents: The default generative model has been changed to gemini-1.0-pro-001.

Vertex AI Agents: Agent apps now support all languages supported by Vertex AI generative models.

Vertex AI Conversation has been renamed to Vertex AI Agents

Dialogflow CX: You can now access the session ID with built-in parameters.

Vertex AI Agents: Agent apps now support the eu multi-region.

Dialogflow CX: The following new region is available:

• us: United States multi-region accessed via usa-dialogflow.googleapis.com hostname

Dialogflow CX: The Conversation history API is now available for public preview.

Vertex AI Conversation: You can now create a data store in one language that is connected to an agent that uses different languages.

Dialogflow CX: Language auto detect is now available for chat conversations. You can configure Dialogflow CX to detect an end-user's language and automatically respond in that same language. See the language reference page for a list of languages available for this feature.

Vertex AI Conversation: Data stores now support parse and chunk configuration.

Dialogflow CX: Dialogflow CX phone gateway is now generally available.

Dialogflow CX: Call companion is now generally available with new user interface settings.

Starting on April 17, 2024, the Dialogflow CX and Dialogflow ES traffic with audio will gradually route away from the classic phone_call speech model to the new conformer-based speech models for the following language tags: en-au, en-gb, de, de-de, es, es-es, es-us, fr, fr-ca, fr-fr, it, it-it, ja, pt-br. For more information, see Dialogflow ES migration documentation and Dialogflow CX migration documentation.

Dialogflow CX: You can now enable smart endpointing.

Dialogflow CX: The Override request-level speech model has been added to advanced speech settings. This can be used to override the speech model provided in a runtime API request.

Dialogflow CX: DTMF for telephony integrations is now available for preview.

All generative features: The text-bison-001 model and fine-tuned text-bison@001 options will be deprecated by Vertex AI on July 6th. Please transition as soon as possible to the default option or another model available in the settings.

Vertex AI Conversation data stores: Gemini-pro 1.0 is now officially in General Availability. The model includes optimized prompting, delivering enhanced results with minimal latency impact. Please note: prompt optimization is currently focused on English, with other languages to follow.

Dialogflow CX request-scoped parameters now supports the $request.user-utterance parameter to reference the end-user utterance.

Dialogflow CX now provides the offers and deals prebuilt component.

Vertex AI Conversation data store tools now support filter and userMetadata example parameters.

The following prebuilt components have been added to Dialogflow CX:

• Retail fraud and dispute
• Cancel order
• Return and refund
• Exchange order

The Dialogflow ES and Dialogflow CX us-dialogflow.googleapis.com endpoint and locations/us resource location, which served as aliases for global resources, will be discontinued on May 21, 2024. For more information, see the email announcement.

From March 18 to April 15, 2024 (new dates for the same migration announced earlier), for certain language tag and speech setting combinations, the Dialogflow CX and Dialogflow ES traffic with audio will gradually route away from the classic Speech-to-Text models behind the command_and_search, default, phone_call, and video model identifiers to the new conformer-based speech models.

If your Dialogflow agents have audio traffic and use one of the following language tags: en, en-us, en-au, en-gb, en-in, de, es, es-es, es-us, fr, fr-ca, fr-fr, it, ja, nl, pt-br, read more about Dialogflow CX speech model migration and Dialogflow ES speech model migration.

Vertex AI Conversation now supports the Dialogflow CX Messenger integration for preview.

Vertex AI Conversation generative agent creation with playbooks is now available for public preview. Try it by following the quickstart.

The previously announced migration from Standard NLU to Advanced NLU will no longer occur on March 1, 2024. For more information, see the email announcement

Dialogflow CX channel-specific response messages are now available for the following integrations: Google Chat, LINE, Messenger from Meta, Workplace from Meta, Slack. See the integration documentation for details.

You can now import and export Dialogflow CX custom entities.

Dialogflow CX agents now default to advanced NLU.

Dialogflow CX text-to-speech settings now have an option for custom voices.

Two new Dialogflow CX prebuilt components are available: retail authentication and order status.

Vertex AI Conversation data stores now support unstructured CSV.

Dialogflow CX generators has added support for text-bison@002 and gemini-pro models.

With data store agents, you can now provide a custom summarization prompt.

The Dialogflow CX name collection prebuilt component removed use of the deprecated system entities @sys.given-name and @sys.last-name. They have been replaced with @sys.person.

Speech model migration announced eariler will include two additional language tags: en-in and nl. The migration start date is postponed and will be announced in a new release note later. For more information, read Dialogflow CX speech model migration and Dialogflow ES speech model migration.

To temporarily opt out from the speech model migration, you can now use the opt_out_conformer_model_migration field in the runtime Dialogflow API requests. Read more about temporary opt-out for Dialogflow CX and Dialogflow ES.

Dialogflow CX now allows cancellation of partial response playback.

Vertex AI Conversation has launched generative agents in the Vertex AI Conversation console. Generative agents were previously called playbook agents in the Dialogflow CX console. This feature currently has restricted access.

Dialogflow CX Standard NLU agents will be migrated to Advanced NLU starting March 1, 2024. For updated information, see the email announcement.

The Text-to-Speech API used by Dialogflow now supports two new experimental voices for en-us: en-US-Journey-D and en-US-Journey-F. For more details, see Journey voices.

Vertex AI Conversation: You can now select the generative model for data store agents.