diff --git a/ollama-client/ollama-client-core/src/commonMain/kotlin/com/tddworks/ollama/api/chat/OllamaChatRequest.kt b/ollama-client/ollama-client-core/src/commonMain/kotlin/com/tddworks/ollama/api/chat/OllamaChatRequest.kt
index 9227c76..18f43fe 100644
--- a/ollama-client/ollama-client-core/src/commonMain/kotlin/com/tddworks/ollama/api/chat/OllamaChatRequest.kt
+++ b/ollama-client/ollama-client-core/src/commonMain/kotlin/com/tddworks/ollama/api/chat/OllamaChatRequest.kt
@@ -1,17 +1,39 @@
 package com.tddworks.ollama.api.chat
 
+import com.tddworks.ollama.api.AnySerial
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
-import kotlinx.serialization.json.*
-
 
+/**
+ * https://github.com/ollama/ollama/blob/main/docs/api.md
+ * Generate a chat completion
+ */
 @Serializable
 data class OllamaChatRequest(
+    /**
+     * (required) the model name
+     */
     @SerialName("model") val model: String,
+    /**
+     * (required) a list of messages to send to the model
+     */
     @SerialName("messages") val messages: List<OllamaChatMessage>,
+    /**
+     * Advanced parameters (optional):
+     * the format to return a response in. Currently the only accepted value is json
+     */
     @SerialName("format") val format: String? = null,
-//    @SerialName("options") val options: Map<String, Any>? = null,
+    /**
+     * additional model parameters listed in the documentation for the Modelfile such as temperature
+     */
+    @SerialName("options") val options: Map<String, AnySerial>? = null,
+    /**
+     * keep_alive: controls how long the model will stay loaded into memory following the request (default: 5m)
+     */
     @SerialName("keep_alive") val keepAlive: String? = null,
+    /**
+     * stream: if false the response will be returned as a single response object, rather than a stream of objects
+     */
     @SerialName("stream")
     val stream: Boolean? = null,
 ) {
diff --git a/openai-gateway/openai-gateway-core/src/jvmTest/kotlin/com/tddworks/ollama/api/chat/OllamaChatRequestTest.kt b/openai-gateway/openai-gateway-core/src/jvmTest/kotlin/com/tddworks/ollama/api/chat/OllamaChatRequestTest.kt
index 955074d..8b0f324 100644
--- a/openai-gateway/openai-gateway-core/src/jvmTest/kotlin/com/tddworks/ollama/api/chat/OllamaChatRequestTest.kt
+++ b/openai-gateway/openai-gateway-core/src/jvmTest/kotlin/com/tddworks/ollama/api/chat/OllamaChatRequestTest.kt
@@ -1,10 +1,48 @@
 package com.tddworks.ollama.api.chat
 
+import com.tddworks.ollama.api.chat.internal.JsonLenient
 import org.junit.jupiter.api.Test
 import kotlin.test.assertEquals
 
 class OllamaChatRequestTest {
 
+    @Test
+    fun `should convert json to object`() {
+        // given
+        val json = """
+        {
+            "model": "llama3",
+            "messages": [{
+               "role": "user",
+               "content": "Why is the sky blue?"
+            }],
+            "format": "json",
+            "keep_alive": "5m",
+            "stream": false,
+            "options": {
+                "num_predict": 100,
+                "temperature": 0.8,
+                "stop": ["\n", "user:"]
+            }
+        }
+        """.trimIndent()
+
+        // when
+        val request = JsonLenient.decodeFromString(OllamaChatRequest.serializer(), json)
+
+        // then
+        assertEquals("llama3", request.model)
+        assertEquals(1, request.messages.size)
+        assertEquals("user", request.messages[0].role)
+        assertEquals("Why is the sky blue?", request.messages[0].content)
+        assertEquals("json", request.format)
+        assertEquals("5m", request.keepAlive)
+
+        assertEquals(100, request.options?.get("num_predict"))
+        assertEquals(0.8, request.options?.get("temperature"))
+        assertEquals(listOf("\n", "user:"), request.options?.get("stop"))
+    }
+
     @Test
     fun `should return dummy request`() {
         // given