Added fallback routing when an AI Agent is unavailable.
Improved Human Handoff to verify that the destination is available before transferring.
Improved Knowledge Source retrieval to return more relevant results and remove duplicate Q&A pairs.
Improved Receptionist behavior by confirming when chat messages or emails have been sent.
Improved PA caller screening, including more reliable collection of the caller’s company.
Improved handling of hostile, non-collaborative and nonsensical callers.
Improved caller transcription quality.
Improved AI Agent audio quality by reducing echo and background noise.
Updated real-time model and provider handling, including OpenAI model notation, real-time transcription, initial language selection and voice defaults.
Redesigned AI Agent prompts with separate behavior for voice calls and chat conversations.
3CX AI, V1.4 (Build U9-48), June 2026
Added Fuzzy Search for extension lookup in myphone search (works with Update 9).
Increased AI transcription timer to 120 seconds.
Fixed AI Personal Assistant not using First Message.
Fixed Check Busy not being respected by the Personal Assistant.
Fixed call screening text.
3CX AI, V1.4 (Build U9-38), April 2026
Completely rewritten and simplified system prompts for Receptionist and Personal Assistant.
3CX AI, V1.4 (Build U9-12), March 2026
Added GPT-4.5 to the model list.
Added Realtime 1.5 model support.
Added logging of important OpenAI errors for better diagnostics.
Updated OpenAI model list to reflect the current available models.
Updated Agent UI layout and interface changes.
Simplified tool calling to apply only to PA interactions - reduces unnecessary tool overhead for standard agents.
Removed nano models from the model list; retained mini models only.
3CX AI, V1.2 (Build 5), February 2026
Added new models for OpenAI
3CX AI, V1.2 RC (Build 3), December 2025
Improved handling of call transfers when Confidential Mode is enabled.
Improved updates under windows operating system.
3CX AI, V1.1 (Build 198), December 2025
Added Personal Assistant (PA) Role.
Added Confidentiality Mode.
Added knowledge sources / vector storage configuration with support for uploading sources.
Added agent-to-agent call screening handover – allowing agents to handle, transfer, and exchange calls between each other.
Improved Call by name transfers
Updated UI and Agent System Prompts
Fixed Transfer to Voicemail.
3CX AI, V1.1 (Build 147), November 2025
Added a Single vs Multi-Language Response Mode setting.
Added Transfer to Voicemail tool (route caller directly to voicemail when appropriate).
Added Take Message (Chat Forwarding) tool (capture caller message and forward it via chat to the right recipient).
Fixed an issue where routing exceptions were not saved correctly.
Fixed locale mismatch issues that could cause failures when creating AI Agents.
3CX AI, V1.1 (Build 87), October 2025
Added AI Agents.
Improved AI service stability by fixing exceptions during service restart + auto-reconnect, increasing uptime.
