diff --git a/openai-client/src/commonMain/kotlin/com.aallam.openai.client/extension/ChatChuck.kt b/openai-client/src/commonMain/kotlin/com.aallam.openai.client/extension/ChatChunk.kt
similarity index 100%
rename from openai-client/src/commonMain/kotlin/com.aallam.openai.client/extension/ChatChuck.kt
rename to openai-client/src/commonMain/kotlin/com.aallam.openai.client/extension/ChatChunk.kt
diff --git a/openai-client/src/commonMain/kotlin/com.aallam.openai.client/extension/internal/ChatMessageAssembler.kt b/openai-client/src/commonMain/kotlin/com.aallam.openai.client/extension/internal/ChatMessageAssembler.kt
index 7f8f521b..6d4d843d 100644
--- a/openai-client/src/commonMain/kotlin/com.aallam.openai.client/extension/internal/ChatMessageAssembler.kt
+++ b/openai-client/src/commonMain/kotlin/com.aallam.openai.client/extension/internal/ChatMessageAssembler.kt
@@ -11,12 +11,14 @@ internal class ChatMessageAssembler {
     private val chatContent = StringBuilder()
     private var chatRole: ChatRole? = null
     private val toolCallsAssemblers = mutableMapOf<Int, ToolCallAssembler>()
+    private var chatContentFilterOffsets = mutableListOf<ContentFilterOffsets>()
+    private var chatContentFilterResults = mutableListOf<ContentFilterResults>()
 
     /**
      * Merges a chat chunk into the chat message being assembled.
      */
     fun merge(chunk: ChatChunk): ChatMessageAssembler {
-        chunk.delta.run {
+        chunk.delta?.run {
             role?.let { chatRole = it }
             content?.let { chatContent.append(it) }
             functionCall?.let { call ->
@@ -30,6 +32,12 @@ internal class ChatMessageAssembler {
                 assembler.merge(toolCall)
             }
         }
+        chunk.contentFilterOffsets?.also {
+            chatContentFilterOffsets.add(it)
+        }
+        chunk.contentFilterResults?.also {
+            chatContentFilterResults.add(it)
+        }
         return this
     }
 
@@ -39,6 +47,8 @@ internal class ChatMessageAssembler {
     fun build(): ChatMessage = chatMessage {
         this.role = chatRole
         this.content = chatContent.toString()
+        this.contentFilterOffsets = chatContentFilterOffsets
+        this.contentFilterResults = chatContentFilterResults
         if (chatFuncName.isNotEmpty() || chatFuncArgs.isNotEmpty()) {
             this.functionCall = FunctionCall(chatFuncName.toString(), chatFuncArgs.toString())
             this.name = chatFuncName.toString()
diff --git a/openai-client/src/commonTest/kotlin/com/aallam/openai/client/TestChatChunk.kt b/openai-client/src/commonTest/kotlin/com/aallam/openai/client/TestChatChunk.kt
index ab51ce21..5fcd812b 100644
--- a/openai-client/src/commonTest/kotlin/com/aallam/openai/client/TestChatChunk.kt
+++ b/openai-client/src/commonTest/kotlin/com/aallam/openai/client/TestChatChunk.kt
@@ -4,6 +4,9 @@ import com.aallam.openai.api.chat.ChatChunk
 import com.aallam.openai.api.chat.ChatDelta
 import com.aallam.openai.api.chat.ChatMessage
 import com.aallam.openai.api.chat.ChatRole
+import com.aallam.openai.api.chat.ContentFilterOffsets
+import com.aallam.openai.api.chat.ContentFilterResult
+import com.aallam.openai.api.chat.ContentFilterResults
 import com.aallam.openai.api.core.FinishReason
 import com.aallam.openai.client.extension.mergeToChatMessage
 import kotlin.test.Test
@@ -20,6 +23,8 @@ class TestChatChunk {
                     role = ChatRole(role = "assistant"),
                     content = ""
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -28,6 +33,8 @@ class TestChatChunk {
                     role = null,
                     content = "The"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -36,6 +43,8 @@ class TestChatChunk {
                     role = null,
                     content = " World"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -44,6 +53,8 @@ class TestChatChunk {
                     role = null,
                     content = " Series"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -52,6 +63,8 @@ class TestChatChunk {
                     role = null,
                     content = " in"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -60,6 +73,8 @@ class TestChatChunk {
                     role = null,
                     content = " "
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -68,6 +83,8 @@ class TestChatChunk {
                     role = null,
                     content = "202"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -76,6 +93,8 @@ class TestChatChunk {
                     role = null,
                     content = "0"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -84,6 +103,8 @@ class TestChatChunk {
                     role = null,
                     content = " is"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -92,6 +113,8 @@ class TestChatChunk {
                     role = null,
                     content = " being held"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -100,6 +123,8 @@ class TestChatChunk {
                     role = null,
                     content = " in"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -108,6 +133,8 @@ class TestChatChunk {
                     role = null,
                     content = " Texas"
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -116,6 +143,8 @@ class TestChatChunk {
                     role = null,
                     content = "."
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
                 finishReason = null
             ),
             ChatChunk(
@@ -124,6 +153,24 @@ class TestChatChunk {
                     role = null,
                     content = null
                 ),
+                contentFilterOffsets = null,
+                contentFilterResults = null,
+                finishReason = FinishReason(value = "stop")
+            ),
+            ChatChunk(
+                index = 0,
+                delta = null,
+                contentFilterOffsets = ContentFilterOffsets(
+                    checkOffset = 1,
+                    startOffset = 1,
+                    endOffset = 1,
+                ),
+                contentFilterResults = ContentFilterResults(
+                    hate = ContentFilterResult(
+                        filtered = false,
+                        severity = "high",
+                    )
+                ),
                 finishReason = FinishReason(value = "stop")
             )
         )
@@ -132,6 +179,21 @@ class TestChatChunk {
             role = ChatRole.Assistant,
             content = "The World Series in 2020 is being held in Texas.",
             name = null,
+            contentFilterResults = listOf(
+                ContentFilterResults(
+                    hate = ContentFilterResult(
+                        filtered = false,
+                        severity = "high",
+                    )
+                )
+            ),
+            contentFilterOffsets = listOf(
+                ContentFilterOffsets(
+                    checkOffset = 1,
+                    startOffset = 1,
+                    endOffset = 1,
+                )
+            ),
         )
         assertEquals(chatMessage, message)
     }
diff --git a/openai-client/src/commonTest/kotlin/com/aallam/openai/client/TestChatCompletionChunk.kt b/openai-client/src/commonTest/kotlin/com/aallam/openai/client/TestChatCompletionChunk.kt
new file mode 100644
index 00000000..90ff4d81
--- /dev/null
+++ b/openai-client/src/commonTest/kotlin/com/aallam/openai/client/TestChatCompletionChunk.kt
@@ -0,0 +1,25 @@
+package com.aallam.openai.client
+
+import com.aallam.openai.api.chat.ChatCompletionChunk
+import com.aallam.openai.api.file.FileSource
+import com.aallam.openai.client.internal.JsonLenient
+import com.aallam.openai.client.internal.TestFileSystem
+import com.aallam.openai.client.internal.testFilePath
+import kotlin.test.Test
+import okio.buffer
+
+class TestChatCompletionChunk {
+    @Test
+    fun testContentFilterDeserialization() {
+        val json = FileSource(path = testFilePath("json/azureContentFilterChunk.json"), fileSystem = TestFileSystem)
+        val actualJson = json.source.buffer().readByteArray().decodeToString()
+        JsonLenient.decodeFromString<ChatCompletionChunk>(actualJson)
+    }
+
+    @Test
+    fun testDeserialization() {
+        val json = FileSource(path = testFilePath("json/chatChunk.json"), fileSystem = TestFileSystem)
+        val actualJson = json.source.buffer().readByteArray().decodeToString()
+        JsonLenient.decodeFromString<ChatCompletionChunk>(actualJson)
+    }
+}
diff --git a/openai-client/src/commonTest/resources/json/azureContentFilterChunk.json b/openai-client/src/commonTest/resources/json/azureContentFilterChunk.json
new file mode 100644
index 00000000..db250571
--- /dev/null
+++ b/openai-client/src/commonTest/resources/json/azureContentFilterChunk.json
@@ -0,0 +1,35 @@
+{
+    "choices": [
+        {
+            "content_filter_offsets": {
+                "check_offset": 33188,
+                "start_offset": 33188,
+                "end_offset": 33557
+            },
+            "content_filter_results": {
+                "hate": {
+                    "filtered": false,
+                    "severity": "safe"
+                },
+                "self_harm": {
+                    "filtered": false,
+                    "severity": "safe"
+                },
+                "sexual": {
+                    "filtered": false,
+                    "severity": "safe"
+                },
+                "violence": {
+                    "filtered": false,
+                    "severity": "safe"
+                }
+            },
+            "finish_reason": null,
+            "index": 0
+        }
+    ],
+    "created": 0,
+    "id": "",
+    "model": "",
+    "object": ""
+}
diff --git a/openai-client/src/commonTest/resources/json/chatChunk.json b/openai-client/src/commonTest/resources/json/chatChunk.json
new file mode 100644
index 00000000..0bd182e7
--- /dev/null
+++ b/openai-client/src/commonTest/resources/json/chatChunk.json
@@ -0,0 +1,16 @@
+{
+    "choices": [
+        {
+            "delta": {
+                "content": " engineering"
+            },
+            "finish_reason": null,
+            "index": 0
+        }
+    ],
+    "created": 1716855566,
+    "id": "chatcmpl-9TeqkT3BJs5zXQq12b204deXcY5nj",
+    "model": "gpt-4o-2024-05-13",
+    "object": "chat.completion.chunk",
+    "system_fingerprint": "fp_5f4bad809a"
+}
\ No newline at end of file
diff --git a/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatChunk.kt b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatChunk.kt
index 6066987c..41769872 100644
--- a/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatChunk.kt
+++ b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatChunk.kt
@@ -1,6 +1,5 @@
 package com.aallam.openai.api.chat;
 
-import com.aallam.openai.api.BetaOpenAI
 import com.aallam.openai.api.core.FinishReason
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
@@ -19,7 +18,17 @@ public data class ChatChunk(
     /**
      * The generated chat message.
      */
-    @SerialName("delta") public val delta: ChatDelta,
+    @SerialName("delta") public val delta: ChatDelta? = null,
+
+    /**
+     * Azure content filter offsets
+     */
+    @SerialName("content_filter_offsets") public val contentFilterOffsets: ContentFilterOffsets? = null,
+
+    /**
+     * Azure content filter results
+     */
+    @SerialName("content_filter_results") public val contentFilterResults: ContentFilterResults? = null,
 
     /**
      * The reason why OpenAI stopped generating.
diff --git a/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatMessage.kt b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatMessage.kt
index 8a6ad832..1a76e031 100644
--- a/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatMessage.kt
+++ b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ChatMessage.kt
@@ -45,6 +45,16 @@ public data class ChatMessage(
      * Tool call ID.
      */
     @SerialName("tool_call_id") public val toolCallId: ToolId? = null,
+
+    /**
+     * Azure Content Filter Results
+     */
+    @SerialName("content_filter_results") public val contentFilterResults: List<ContentFilterResults>? = null,
+
+    /**
+     * Azure Content Filter Offsets
+     */
+    @SerialName("content_filter_offsets") public val contentFilterOffsets: List<ContentFilterOffsets>? = null,
 ) {
 
     public constructor(
@@ -54,6 +64,8 @@ public data class ChatMessage(
         functionCall: FunctionCall? = null,
         toolCalls: List<ToolCall>? = null,
         toolCallId: ToolId? = null,
+        contentFilterResults: List<ContentFilterResults>? = null,
+        contentFilterOffsets: List<ContentFilterOffsets>? = null,
     ) : this(
         role = role,
         messageContent = content?.let { TextContent(it) },
@@ -61,6 +73,8 @@ public data class ChatMessage(
         functionCall = functionCall,
         toolCalls = toolCalls,
         toolCallId = toolCallId,
+        contentFilterOffsets = contentFilterOffsets,
+        contentFilterResults = contentFilterResults,
     )
 
     public constructor(
@@ -70,6 +84,8 @@ public data class ChatMessage(
         functionCall: FunctionCall? = null,
         toolCalls: List<ToolCall>? = null,
         toolCallId: ToolId? = null,
+        contentFilterResults: List<ContentFilterResults>? = null,
+        contentFilterOffsets: List<ContentFilterOffsets>? = null,
     ) : this(
         role = role,
         messageContent = content?.let { ListContent(it) },
@@ -77,6 +93,8 @@ public data class ChatMessage(
         functionCall = functionCall,
         toolCalls = toolCalls,
         toolCallId = toolCallId,
+        contentFilterOffsets = contentFilterOffsets,
+        contentFilterResults = contentFilterResults,
     )
 
     val content: String?
@@ -282,6 +300,16 @@ public class ChatMessageBuilder {
      */
     public var toolCalls: List<ToolCall>? = null
 
+    /**
+     * Azure content filter offsets
+     */
+    public var contentFilterOffsets: List<ContentFilterOffsets>? = null
+
+    /**
+     * Azure content filter results
+     */
+    public var contentFilterResults: List<ContentFilterResults>? = null
+
     /**
      * Tool call ID.
      */
@@ -313,6 +341,8 @@ public class ChatMessageBuilder {
             functionCall = functionCall,
             toolCalls = toolCalls,
             toolCallId = toolCallId,
+            contentFilterOffsets = contentFilterOffsets,
+            contentFilterResults = contentFilterResults,
         )
     }
 }
diff --git a/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ContentFilterOffsets.kt b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ContentFilterOffsets.kt
new file mode 100644
index 00000000..d9cdfa2c
--- /dev/null
+++ b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ContentFilterOffsets.kt
@@ -0,0 +1,11 @@
+package com.aallam.openai.api.chat
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+public data class ContentFilterOffsets(
+    @SerialName("check_offset") val checkOffset: Int?,
+    @SerialName("start_offset") val startOffset: Int?,
+    @SerialName("end_offset") val endOffset: Int?,
+)
diff --git a/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ContentFilterResults.kt b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ContentFilterResults.kt
new file mode 100644
index 00000000..e19cb2a4
--- /dev/null
+++ b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/chat/ContentFilterResults.kt
@@ -0,0 +1,20 @@
+package com.aallam.openai.api.chat
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+public data class ContentFilterResult(
+    @SerialName("filtered") val filtered: Boolean,
+    @SerialName("severity") val severity: String,
+)
+
+@Serializable
+public data class ContentFilterResults(
+    @SerialName("hate") val hate: ContentFilterResult? = null,
+    @SerialName("self_harm") val selfHarm: ContentFilterResult? = null,
+    @SerialName("sexual") val sexual: ContentFilterResult? = null,
+    @SerialName("violence") val violence: ContentFilterResult? = null,
+    @SerialName("jailbreak") val jailbreak: ContentFilterResult? = null,
+    @SerialName("profanity") val profanity: ContentFilterResult? = null,
+)
diff --git a/openai-core/src/commonMain/kotlin/com.aallam.openai.api/core/FinishReason.kt b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/core/FinishReason.kt
index b8b1931b..290058c9 100644
--- a/openai-core/src/commonMain/kotlin/com.aallam.openai.api/core/FinishReason.kt
+++ b/openai-core/src/commonMain/kotlin/com.aallam.openai.api/core/FinishReason.kt
@@ -11,5 +11,6 @@ public value class FinishReason(public val value: String) {
         public val Length: FinishReason = FinishReason("length")
         public val FunctionCall: FinishReason = FinishReason("function_call")
         public val ToolCalls: FinishReason = FinishReason("tool_calls")
+        public val ContentFilter: FinishReason = FinishReason("content_filter")
     }
 }
diff --git a/sample/jvm/src/main/kotlin/com/aallam/openai/sample/jvm/Chat.kt b/sample/jvm/src/main/kotlin/com/aallam/openai/sample/jvm/Chat.kt
index 7224221c..1efc3c4a 100644
--- a/sample/jvm/src/main/kotlin/com/aallam/openai/sample/jvm/Chat.kt
+++ b/sample/jvm/src/main/kotlin/com/aallam/openai/sample/jvm/Chat.kt
@@ -28,7 +28,7 @@ suspend fun chat(openAI: OpenAI) {
 
     println("\n>️ Creating chat completions stream...")
     openAI.chatCompletions(chatCompletionRequest)
-        .onEach { print(it.choices.first().delta.content.orEmpty()) }
+        .onEach { print(it.choices.first().delta?.content.orEmpty()) }
         .onCompletion { println() }
         .collect()
 }
diff --git a/sample/native/src/nativeMain/kotlin/main.kt b/sample/native/src/nativeMain/kotlin/main.kt
index 6f87389e..38bea70c 100644
--- a/sample/native/src/nativeMain/kotlin/main.kt
+++ b/sample/native/src/nativeMain/kotlin/main.kt
@@ -89,7 +89,7 @@ fun main(): Unit = runBlocking {
 
     println("\n>️ Creating chat completions stream...")
     openAI.chatCompletions(chatCompletionRequest)
-        .onEach { print(it.choices.first().delta.content.orEmpty()) }
+        .onEach { print(it.choices.first().delta?.content.orEmpty()) }
         .onCompletion { println() }
         .launchIn(this)
         .join()