diff --git a/app/src/main/java/com/hjx/parent/api/ChatApi.java b/app/src/main/java/com/hjx/parent/api/ChatApi.java
new file mode 100644
index 0000000..418e55b
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/ChatApi.java
@@ -0,0 +1,10 @@
+package com.hjx.parent.api;
+
+import retrofit2.http.Header;
+import retrofit2.http.POST;
+import retrofit2.http.Url;
+
+public interface ChatApi {
+    @POST
+    void aiChat(@Url String url, @Header("Authorization") String token);
+}
diff --git a/app/src/main/java/com/hjx/parent/api/ChatChoices.java b/app/src/main/java/com/hjx/parent/api/ChatChoices.java
new file mode 100644
index 0000000..e3ebfc1
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/ChatChoices.java
@@ -0,0 +1,13 @@
+package com.hjx.parent.api;
+
+import com.google.gson.annotations.SerializedName;
+
+public class ChatChoices {
+
+    public ChatMessage message;
+    public int index;
+    @SerializedName("finish_reason")
+    public String finishReason;
+    public String logprobs;
+
+}
diff --git a/app/src/main/java/com/hjx/parent/api/ChatError.java b/app/src/main/java/com/hjx/parent/api/ChatError.java
new file mode 100644
index 0000000..e18697a
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/ChatError.java
@@ -0,0 +1,8 @@
+package com.hjx.parent.api;
+
+public class ChatError {
+    String code;
+    String message;
+    String param;
+    String type;
+}
diff --git a/app/src/main/java/com/hjx/parent/api/ChatMessage.java b/app/src/main/java/com/hjx/parent/api/ChatMessage.java
new file mode 100644
index 0000000..3c98e91
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/ChatMessage.java
@@ -0,0 +1,44 @@
+package com.hjx.parent.api;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+public class ChatMessage {
+    public ChatMessage() {
+    }
+    public ChatMessage(String role, Object content) {
+        this.role = role;
+        this.content = content;
+    }
+
+    public String role;
+    public Object content;
+
+    public static ChatMessage fromImage(String role, String text, String... urls) {
+        List<ContentItem> items = new ArrayList<>();
+        if (text != null && !text.isEmpty()) {
+            items.add(new ContentItem(ContentItem.TYPE_TEXT, text));
+        }
+        for (String it: urls) {
+            items.add(new ContentItem(ContentItem.TYPE_IMAGE, it));
+        }
+        return new ChatMessage(role, items);
+    }
+
+    public String getTextContent() {
+        if (content == null) return null;
+        if (content instanceof String) return (String) content;
+        ContentItem item = firstText();
+        return item == null ? null : item.text;
+    }
+
+    private ContentItem firstText() {
+        if (!(content instanceof List<?>)) return null;
+        List<?> anyList = (List<?>) content;
+        return anyList.stream()
+                .map(ContentItem::reSerialize)
+                .filter(Objects::nonNull)
+                .findFirst().orElse(null);
+    }
+}
diff --git a/app/src/main/java/com/hjx/parent/api/ChatRequest.java b/app/src/main/java/com/hjx/parent/api/ChatRequest.java
new file mode 100644
index 0000000..62aace3
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/ChatRequest.java
@@ -0,0 +1,9 @@
+package com.hjx.parent.api;
+
+import java.util.List;
+
+public class ChatRequest {
+    public String model;
+    public List<ChatMessage> messages;
+    public boolean stream;
+}
diff --git a/app/src/main/java/com/hjx/parent/api/ChatResponse.java b/app/src/main/java/com/hjx/parent/api/ChatResponse.java
new file mode 100644
index 0000000..d330688
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/ChatResponse.java
@@ -0,0 +1,19 @@
+package com.hjx.parent.api;
+
+import com.google.gson.annotations.SerializedName;
+
+import java.util.List;
+
+public class ChatResponse {
+    public List<ChatChoices> choices;
+    public String created;
+    public String id;
+    public String model;
+    @SerializedName("service_tier")
+    public String serviceTier;
+    @SerializedName("object")
+    public String obj;
+    public ChatUsage usage;
+
+    public ChatError error;
+}
diff --git a/app/src/main/java/com/hjx/parent/api/ChatUsage.java b/app/src/main/java/com/hjx/parent/api/ChatUsage.java
new file mode 100644
index 0000000..038f274
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/ChatUsage.java
@@ -0,0 +1,16 @@
+package com.hjx.parent.api;
+
+import com.google.gson.annotations.SerializedName;
+
+public class ChatUsage {
+    @SerializedName("completion_tokens")
+    public int completionTokens;
+    @SerializedName("prompt_tokens")
+    public int promptTokens;
+    @SerializedName("total_tokens")
+    public int totalTokens;
+    @SerializedName("prompt_tokens_details")
+    public PromptTokensDetails promptTokensDetails;
+    @SerializedName("completion_tokens_details")
+    public CompletionTokensDetails completionTokensDetails;
+}
diff --git a/app/src/main/java/com/hjx/parent/api/CompletionTokensDetails.java b/app/src/main/java/com/hjx/parent/api/CompletionTokensDetails.java
new file mode 100644
index 0000000..0e8bdf3
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/CompletionTokensDetails.java
@@ -0,0 +1,5 @@
+package com.hjx.parent.api;
+
+public class CompletionTokensDetails {
+    public int reasoningTokens;
+}
diff --git a/app/src/main/java/com/hjx/parent/api/ContentItem.java b/app/src/main/java/com/hjx/parent/api/ContentItem.java
new file mode 100644
index 0000000..5f78f0f
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/ContentItem.java
@@ -0,0 +1,44 @@
+package com.hjx.parent.api;
+
+import com.google.gson.Gson;
+import com.google.gson.annotations.SerializedName;
+
+public class ContentItem {
+    public static final String TYPE_TEXT = "text";
+    public static final String TYPE_IMAGE = "image_url";
+
+
+    public ContentItem() {
+    }
+    public ContentItem(String type, String text) {
+        this.type = type;
+        this.text = text;
+    }
+    public ContentItem(String type, ContentImage imageUrl) {
+        this.type = type;
+        this.imageUrl = imageUrl;
+    }
+
+    public String type;
+    public String text;
+    @SerializedName("image_url")
+    public ContentImage imageUrl;
+
+    public static class ContentImage {
+        public String url;
+    }
+
+
+    private static final Gson gson = new Gson();
+    static ContentItem reSerialize(Object any) {
+        if (any == null) return null;
+        try {
+            String json = gson.toJson(any);
+            ContentItem it = gson.fromJson(json, ContentItem.class);
+            return it;
+        } catch (Throwable t) {
+            t.printStackTrace();
+        }
+        return null;
+    }
+}
diff --git a/app/src/main/java/com/hjx/parent/api/PromptTokensDetails.java b/app/src/main/java/com/hjx/parent/api/PromptTokensDetails.java
new file mode 100644
index 0000000..774b24d
--- /dev/null
+++ b/app/src/main/java/com/hjx/parent/api/PromptTokensDetails.java
@@ -0,0 +1,5 @@
+package com.hjx.parent.api;
+
+public class PromptTokensDetails {
+    public int cachedTokens;
+}