From ba40d6135ce24a71acdb2e063e6ef77b1f6c2954 Mon Sep 17 00:00:00 2001
From: Dmytro Skarzhynets <dskarzhynets@thingsboard.io>
Date: Mon, 8 Jun 2026 12:19:07 +0300
Subject: [PATCH] feat: wire up frequency and presence penalties for Gemini
 models

Bump LangChain4j to 1.16.1-TB1, which adds frequencyPenalty and
presencePenalty support to the langchain4j-google-genai integration,
and pass both parameters through for Google Gemini and Google Vertex AI
Gemini models.
---
 .../server/service/ai/Langchain4jChatModelConfigurerImpl.java | 4 ++++
 pom.xml                                                       | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/application/src/main/java/org/thingsboard/server/service/ai/Langchain4jChatModelConfigurerImpl.java b/application/src/main/java/org/thingsboard/server/service/ai/Langchain4jChatModelConfigurerImpl.java
index 8d0e54dc74..3bb39c3671 100644
--- a/application/src/main/java/org/thingsboard/server/service/ai/Langchain4jChatModelConfigurerImpl.java
+++ b/application/src/main/java/org/thingsboard/server/service/ai/Langchain4jChatModelConfigurerImpl.java
@@ -104,6 +104,8 @@ class Langchain4jChatModelConfigurerImpl implements Langchain4jChatModelConfigur
                 .temperature(chatModelConfig.temperature())
                 .topP(chatModelConfig.topP())
                 .topK(chatModelConfig.topK())
+                .frequencyPenalty(chatModelConfig.frequencyPenalty())
+                .presencePenalty(chatModelConfig.presencePenalty())
                 .maxOutputTokens(chatModelConfig.maxOutputTokens())
                 .timeout(toDuration(chatModelConfig.timeoutSeconds()))
                 .maxRetries(chatModelConfig.maxRetries())
@@ -128,6 +130,8 @@ class Langchain4jChatModelConfigurerImpl implements Langchain4jChatModelConfigur
                 .temperature(chatModelConfig.temperature())
                 .topP(chatModelConfig.topP())
                 .topK(chatModelConfig.topK())
+                .frequencyPenalty(chatModelConfig.frequencyPenalty())
+                .presencePenalty(chatModelConfig.presencePenalty())
                 .maxOutputTokens(chatModelConfig.maxOutputTokens())
                 .timeout(toDuration(chatModelConfig.timeoutSeconds()))
                 .maxRetries(chatModelConfig.maxRetries())
diff --git a/pom.xml b/pom.xml
index a9af9ea516..6768f73a10 100755
--- a/pom.xml
+++ b/pom.xml
@@ -142,7 +142,7 @@
         <jakarta.el.version>4.0.2</jakarta.el.version>
         <antisamy.version>1.7.5</antisamy.version>
         <snmp4j.version>3.8.0</snmp4j.version>
-        <langchain4j.version>1.15.1-TB1</langchain4j.version>
+        <langchain4j.version>1.16.1-TB1</langchain4j.version>
         <error_prone_annotations.version>2.43.0</error_prone_annotations.version>
         <animal-sniffer-annotations.version>1.24</animal-sniffer-annotations.version>
         <auto-value-annotations.version>1.11.0</auto-value-annotations.version>