livekit-agents@1.4.5

livekit/agentslivekit-agents@1.4.5Mar 11, 2026by theomonnom

AI Summary

Stability improvements including E2EE encryption fixes, new Phonic plugin, and support for GPT-5.3 and GPT-5.4 Chat models.

Key Highlights

  • Added Phonic Plugin with generate_reply support
  • Added GPT-5.3 and GPT-5.4 Chat Latest support
  • Fixed E2EE encryption of content in data tracks
  • Improved Audio Generation Quality for Cartesia TTS
  • Added modality-aware Instructions

New Features

  • Phonic Plugin integration
  • GPT-5.3 and GPT-5.4 Chat support
  • E2EE content encryption fix
  • Cartesia audio quality improvements

Full Release Notes

## What's Changed
* Pass through additional params to LemonSlice when using the LemonSlice Avatar by @jp-lemon in https://github.com/livekit/agents/pull/4984
* fix(anthropic): add dummy user message for Claude 4.6+ trailing assistant turns by @giulio-leone in https://github.com/livekit/agents/pull/4973
* (keyframe): remove whitespace from py.typed by @tinalenguyen in https://github.com/livekit/agents/pull/4990
* Add Phonic Plugin to LiveKit agents by @qionghuang6 in https://github.com/livekit/agents/pull/4980
* Fixed E2EE encryption of content in data tracks by @zelidrag-arbo in https://github.com/livekit/agents/pull/4992
* fix: resync tool context when tools are mutated inside llm_node by @longcw in https://github.com/livekit/agents/pull/4994
* [🤖 readme-manager] Update README by @ladvoc in https://github.com/livekit/agents/pull/4996
* fix(google): prevent function_call text from leaking to TTS output by @BkSouX in https://github.com/livekit/agents/pull/4999
* (openai responses): add websocket connection pool by @tinalenguyen in https://github.com/livekit/agents/pull/4985
* (openai tts): close openai client by @tinalenguyen in https://github.com/livekit/agents/pull/5012
* nvidia stt: add speaker diarization support by @longcw in https://github.com/livekit/agents/pull/4997
* update error message when TTS is not set by @longcw in https://github.com/livekit/agents/pull/4998
* initialize interval future in init by @tinalenguyen in https://github.com/livekit/agents/pull/5013
* Fix/elevenlabs update default voice non expiring by @yusuf-eren in https://github.com/livekit/agents/pull/5010
* [Inworld] Flush to drain decoder on every audio chunk from server by @ianbbqzy in https://github.com/livekit/agents/pull/4983
* (google): support passing credentials through realtime and llm by @tinalenguyen in https://github.com/livekit/agents/pull/5015
* use default voice accessible to free tier users by @tmshapland in https://github.com/livekit/agents/pull/5020
* make commit_user_turn() return a Future with the audio transcript by @longcw in https://github.com/livekit/agents/pull/5019
* Add GPT-5.4 to OpenAI plugin by @Topherhindman in https://github.com/livekit/agents/pull/5022
* Generate and upload markdown docs by @Topherhindman in https://github.com/livekit/agents/pull/4993
* Add GPT-5.4 and GPT-5.3 Chat Latest support by @Topherhindman in https://github.com/livekit/agents/pull/5030
* Improve Audio Generation Quality for Cartesia TTS Plugin by @tycartesia in https://github.com/livekit/agents/pull/5032
* fix(elevenlabs): handle empty words in _to_timed_words by @MonkeyLeeT in https://github.com/livekit/agents/pull/5036
* fix(deepgram): include word confidence for stt v2 alternatives by @inickt in https://github.com/livekit/agents/pull/5034
* fix: generate final LLM response when max_tool_steps is reached by @IanSteno in https://github.com/livekit/agents/pull/4747
* fix: guard against negative sleep duration in voice agent scheduling by @jnMetaCode in https://github.com/livekit/agents/pull/5040
* add modality-aware Instructions with audio/text variants by @longcw in https://github.com/livekit/agents/pull/4987
* fix(core): move callbacks to the caller by @chenghao-mou in https://github.com/livekit/agents/pull/5039
* Added raw logging of API errors via the LiveKit plugins for both STT and TTS. by @dhruvladia-sarvam in https://github.com/livekit/agents/pull/5025
* Log LemonSlice API error + new agent_idle_prompt arg by @jp-lemon in https://github.com/livekit/agents/pull/5052
* Sarvam v3 tts addns by @dhruvladia-sarvam in https://github.com/livekit/agents/pull/4976
* fix(google): avoid session restart on update_instructions, use mid-session client content by @D-zigi in https://github.com/livekit/agents/pull/5049
* (responses llm): override provider property and set use_websocket to False for wrappers by @tinalenguyen in https://github.com/livekit/agents/pull/5055
* feat(mcp): add MCPToolResultResolver callback for customizing tool call results by @longcw in https://github.com/livekit/agents/pull/5046
* docs: add development instructions to README and example READMEs by @bcherry in https://github.com/livekit/agents/pull/2636
* Improve plugin READMEs with installation, pre-requisites, and docs links by @bcherry in https://github.com/livekit/agents/pull/3025
* Add `generate_reply` and `update_chat_ctx` support to Phonic Plugin by @qionghuang6 in https://github.com/livekit/agents/pull/5058
* feat: enhance worker load management with reserved slots and effective load calculation by @ProblematicToucan in https://github.com/livekit/agents/pull/4911
* fix(core): render error message with full details in traceback by @chenghao-mou in https://github.com/livekit/agents/pull/5047
* feat(core): allow skip_reply when calling commit_user_turn by @chenghao-mou in https://github.com/livekit/agents/pull/5066
* fix(mcp): replace deprecated streamablehttp_client with streamable_http_client by @longcw in https://github.com/livekit/agents/pull/5048
* fix: disable aec warmup timer when audio is disabled by @longcw in https://github.com/livekit/agents/pull/5065
* feat(openai): add transcript_confidence from OpenAI realtime logprobs by @theomonnom in https://github.com/livekit/agents/pull/5070
* Enhance LK Inference STT and TTS options with new parameters and models by @russellmartin-livekit in https://github.com/livekit/agents/pull/4949
* Move Instructions to beta exports by @theomonnom in https://github.com/livekit/agents/pull/5075
* livekit-agents 1.4.5 by @theomonnom in https://github.com/livekit/agents/pull/5076

## New Contributors
* @giulio-leone made their first contribution in https://github.com/livekit/agents/pull/4973
* @qionghuang6 made their first contribution in https://github.com/livekit/agents/pull/4980
* @zelidrag-arbo made their first contribution in https://github.com/livekit/agents/pull/4992
* @tmshapland made their first contribution in https://github.com/livekit/agents/pull/5020
* @tycartesia made their first contribution in https://github.com/livekit/agents/pull/5032
* @inickt made their first contribution in https://github.com/livekit/agents/pull/5034
* @jnMetaCode made their first contribution in https://github.com/livekit/agents/pull/5040
* @D-zigi made their first contribution in https://github.com/livekit/agents/pull/5049
* @ProblematicToucan made their first contribution in https://github.com/livekit/agents/pull/4911

**Full Changelog**: https://github.com/livekit/agents/compare/livekit-agents@1.4.4...livekit-agents@1.4.5