diff --git a/components/AiPrompt.vue b/components/AiPrompt.vue
index c4f992a..8e9c98f 100644
--- a/components/AiPrompt.vue
+++ b/components/AiPrompt.vue
@@ -2,6 +2,7 @@
 import consola from 'consola'
 
 import { useMagicKeys } from '@vueuse/core'
+import { config } from '~/config'
 
 const app = useAppStore()
 
@@ -42,7 +43,7 @@ watch(() => [Cmd_enter.value, Ctrl_enter.value], (v) => {
       placeholder="想要什么样的春联？"
       class="w-full rounded-lg p-4 shadow dark:bg-dark-800 outline-none!"
       border="~ gray focus:(yellow-500)"
-      maxlength="200"
+      :maxlength="config.inputMaxLength"
     />
 
     <button
diff --git a/config/index.ts b/config/index.ts
index c1f09df..f1fae3e 100644
--- a/config/index.ts
+++ b/config/index.ts
@@ -1 +1,4 @@
 export const suggestedCoupletsFilename = 'AI 春联.png'
+export const config = {
+  inputMaxLength: 200,
+}
diff --git a/packages/ai/src/api.ts b/packages/ai/src/api.ts
index 57033ae..5054d0f 100644
--- a/packages/ai/src/api.ts
+++ b/packages/ai/src/api.ts
@@ -2,6 +2,9 @@ import consola from 'consola'
 import type OpenAI from 'openai'
 import { baseChatCompletionCreateParams, baseModel, openai } from './config'
 
+// TODO: pass params
+import { config } from '~/config'
+
 export async function getCompletion(msg: string) {
   const chatCompletion = await openai.chat.completions.create({
     ...baseChatCompletionCreateParams,
@@ -19,18 +22,23 @@ export interface SprintFestivalCouplets {
   总结: string
 }
 
-export async function getCouplets(couplet: string) {
+export async function getCouplets(prompt: string) {
+  /**
+   * 限制输入长度
+   */
+  prompt = prompt.trim().slice(0, config.inputMaxLength)
+
   const tooltip = [
     '请根据我的提示生成一组春联，包含上联、下联各一句，每句字数在五到十三字之间，上下联字数相同，并附上一个恰当的不超过五个字的横批。',
     '并给出一个字总结。',
-    '不需要标点符号，尽量不要使用生僻字。',
+    '不需要标点符号，不要使用生僻字。',
     `格式类型：{
   "上联": "",
   "下联": "",
   "横批": "",
   "总结": ""
 }`,
-    '直接给出可以被 JSON.parse 解析的字符串，不需要解释内容。',
+    '直接给出可以被 JSON.parse 解析的字符串，不要解释内容。',
   ]
 
   const messages: OpenAI.ChatCompletionMessageParam[] = [
@@ -40,13 +48,13 @@ export async function getCouplets(couplet: string) {
     },
   ]
 
-  if (couplet)
-    messages.push({ role: 'user', content: `我的提示是：${couplet}` })
+  if (prompt)
+    messages.push({ role: 'user', content: `我的提示是：${prompt}` })
 
   const chatCompletion = await openai.chat.completions.create({
+    ...baseChatCompletionCreateParams,
     messages,
-    model: 'deepseek-chat',
-    max_tokens: 300,
+    model: baseModel,
     // stream: true
   })
 
diff --git a/packages/ai/src/config.ts b/packages/ai/src/config.ts
index a3606bd..f6b8b1a 100644
--- a/packages/ai/src/config.ts
+++ b/packages/ai/src/config.ts
@@ -12,6 +12,6 @@ export const openai = new OpenAI({
 export const baseModel = 'deepseek-chat'
 
 export const baseChatCompletionCreateParams: Partial<OpenAI.ChatCompletionCreateParamsNonStreaming> = {
-  max_tokens: 300,
+  max_tokens: 100,
   // stream: true
 }