diff --git a/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/AnthropicChatModelConfig.java b/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/AnthropicChatModelConfig.java
index 6477e4f106..04ad459366 100644
--- a/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/AnthropicChatModelConfig.java
+++ b/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/AnthropicChatModelConfig.java
@@ -33,7 +33,7 @@ public record AnthropicChatModelConfig(
         @NotBlank String modelId,
         @PositiveOrZero Double temperature,
         @Positive @Max(1) Double topP,
-        @Positive Integer topK,
+        @PositiveOrZero Integer topK,
         @Positive Integer maxOutputTokens,
         @With @Positive Integer timeoutSeconds,
         @With @PositiveOrZero Integer maxRetries
diff --git a/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/GoogleAiGeminiChatModelConfig.java b/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/GoogleAiGeminiChatModelConfig.java
index d659deaa5c..dac4f9e29b 100644
--- a/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/GoogleAiGeminiChatModelConfig.java
+++ b/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/GoogleAiGeminiChatModelConfig.java
@@ -33,7 +33,7 @@ public record GoogleAiGeminiChatModelConfig(
         @NotBlank String modelId,
         @PositiveOrZero Double temperature,
         @Positive @Max(1) Double topP,
-        @Positive Integer topK,
+        @PositiveOrZero Integer topK,
         Double frequencyPenalty,
         Double presencePenalty,
         @Positive Integer maxOutputTokens,
diff --git a/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/GoogleVertexAiGeminiChatModelConfig.java b/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/GoogleVertexAiGeminiChatModelConfig.java
index a0b7870a6c..75aa3a4f08 100644
--- a/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/GoogleVertexAiGeminiChatModelConfig.java
+++ b/common/data/src/main/java/org/thingsboard/server/common/data/ai/model/chat/GoogleVertexAiGeminiChatModelConfig.java
@@ -33,7 +33,7 @@ public record GoogleVertexAiGeminiChatModelConfig(
         @NotBlank String modelId,
         @PositiveOrZero Double temperature,
         @Positive @Max(1) Double topP,
-        @Positive Integer topK,
+        @PositiveOrZero Integer topK,
         Double frequencyPenalty,
         Double presencePenalty,
         @Positive Integer maxOutputTokens,