> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognigy.com/llms.txt
> Use this file to discover all available pages before exploring further.
# 2025.25
With this release, transformers start using the `axios` library for handling HTTP requests internally instead of `request-promise`. For more details, read [Transformers Overview](/ai/for-developers/transformers/overview).
The following models have been removed from Cognigy.AI because OpenAI and Microsoft Azure OpenAI no longer support them: `gpt-3.5-turbo`, `gpt-3.5-turbo-instruct`, and `gpt-4`.
If you use these models in your Flows, replace them with available models from the [Model Support by Feature](/ai/agents/develop/gen-ai-and-llms/model-support-by-feature) list to ensure your AI Agents remain stable.
Help us improve our product documentation on `docs.cognigy.com` by sharing your thoughts in a [quick survey](https://forms.office.com/e/xnqneVasp2). Your feedback shapes the future of our content!
## 2025.25.1
### Cognigy Live Agent
**Released** December 16, 2025
#### Bug Fixes
* Fixed the issue with the Cognigy.AI OData endpoint where account-level filtering was not correctly applied to the `ReportingEvent` collection
### Cognigy Voice Gateway
**Released** December 10, 2025
#### Bug Fixes
* Fixed the issue where Microsoft Azure's speech services functions didn't work properly for on-premises installations by rolling back the FreeSWITCH image to `cognigy.azurecr.io/vg-freeswitch-mrf:0.9.3`
## 2025.25.0
### Cognigy.AI
**Released** December 9, 2025
#### Features
##### Data Redaction
Introduced [data redaction](/ai/platform-features/data-redaction) to automatically redact any information, including Personally Identifiable Information (PII), from conversation logs and analytics.
This feature prevents exposure or misuse of predefined data while maintaining log readability and analytics accuracy.
##### New Tools for AI Agents
Introduced the [Send Email and Handover to AI Agent tools](/ai/agents/develop/manage-ai-agents), enabling AI Agents to send emails directly and transfer conversations to other AI Agents within workflows
##### New NiCE CXone AAH Endpoint
Provided full access to the [NiCE CXone AAH Endpoint](/agent-copilot/deploy/nice-aah) for all users, enabling human agents to integrate Agent Copilot into their NiCE contact center platform
#### Improvements
* Enabled [Simulator availability](/ai/agents/test/simulator/overview) across all SaaS installations
* Removed the beta flag for the [LLM Fallback](/ai/agents/develop/gen-ai-and-llms/fallback) feature
* Added the Tenant ID field and moved the Billing Time Zone to the Change Organization Information section in the [Management UI](/ai/administer/access/management-ui#manage-organizations)
* Removed the `gpt-3.5-turbo`, `gpt-3.5-turbo-instruct`, and `gpt-4` models
* Replaced the `request-promise` library with Axios for HTTP requests sent from the transformers
* Added support for custom hostnames when deploying the platform behind a CDN or firewall
* Updated logic for generating session IDs for Endpoints. Now, each Endpoint and third‑party account combination, for example, a WhatsApp Endpoint and a WhatsApp account, gets a unique session ID with no duplicates across Endpoints and Projects
#### Bug Fixes
* Fixed the issue where deprecated models were displayed without the Deprecated icon
* Fixed the issue where organization deletion didn't remove the NFS directories
* Fixed the issue where additional attributes in Genesys Open Messaging handovers were corrupted due to invalid data types
* Fixed the issue where the Storm handover provider wasn't working due to request verification issues
* Fixed the issue where the LLM Prompt tool Nodes couldn't be added
* Fixed the issue where custom models and request options for Google Gemini weren't forwarded to the provider
* Fixed the issue where Azure OpenAI LLMs using API key connections with custom URLs failed
* Fixed the issue where the custom attributes in Genesys prevented handovers from being created when they contained nested JSON attributes
### Cognigy Voice Gateway
**Released** December 9, 2025
#### Improvements
* Improved connection handling when multiple WebSocket connection attempts are made, reducing dropped and failed connections
* Improved handling of DTMF signals and Barge-in scenarios, making voice interactions more responsive and accurate
#### Bug Fixes
* Fixed the issue with Silence Overlay and Atmosphere sounds, improving call reliability and user experience
* Fixed the HTTP session failures, such as those occurring when starting a SIPREC session, ensuring reliable call recording and signaling
### Cognigy Webchat
**Released** December 9, 2025
#### Improvements
* Updated Demo Webchat to 3.34.0
### Cognigy Live Agent
**Released** December 9, 2025
#### Features
##### Escalation to Supervisors
Introduced the [escalation to supervisors](/live-agent/settings/inboxes#escalate-conversations-to-supervisors) feature. This feature allows human agents to escalate conversations from the Live Agent interface to a designated supervisor. Supervisors can then take over the conversation, ensuring faster resolution of complex issues and better support management.
##### Live Agent OData Endpoint v2.0
Introduced [Live Agent OData Endpoint version 2.0](/live-agent/tools/odata-endpoint), featuring enhanced functionality and a new teams collection for managing team data.
#### Bug Fixes
* Fixed the issue where memories in Contact Profiles weren't in a human-readable format
* Fixed the issue causing evaluation errors in Excel OData Power Query Editor
### Cognigy Insights
**Released** December 9, 2025
#### Improvements
* Added Markdown rendering support to the Transcript Explorer
* Updated the session's Locale information when switching Locales in the Flow
#### Bug Fixes
* Fixed the issue where a red error message appeared in the Transcript Explorer when quick reply texts were empty
* Fixed the issue where multiselect filters in the Transcript Explorer didn't work as expected
### Infrastructure
#### Version Compatibility Matrix
The version compatibility matrix was updated for the following Cognigy products:
* [Cognigy.AI, Insights, and Agent Copilot](/ai/administer/installation/version-compatibility-matrix)
* [Cognigy Live Agent](/live-agent/installation/deployment/version-compatibility-matrix)
* [Cognigy Voice Gateway](/voice-gateway/installation/version-compatibility-matrix)