diff --git a/README.md b/README.md
index 9a5b850..38a5c6e 100644
--- a/README.md
+++ b/README.md
@@ -216,7 +216,7 @@ services:
       # API interface address, optional, available when OPENAI_API_KEY is set
       OPENAI_API_BASE_URL: xxx
       # API model, optional, available when OPENAI_API_KEY is set, https://platform.openai.com/docs/models
-      # gpt-4, gpt-4-turbo, gpt-4-turbo-preview, gpt-4-0125-preview, gpt-4-1106-preview, gpt-4-0314, gpt-4-0613, gpt-4-32k, gpt-4-32k-0314, gpt-4-32k-0613, gpt-3.5-turbo-16k, gpt-3.5-turbo-16k-0613, gpt-3.5-turbo, gpt-3.5-turbo-0301, gpt-3.5-turbo-0613, text-davinci-003, text-davinci-002, code-davinci-002
+      # gpt-4, gpt-4o, gpt-4-turbo, gpt-4-turbo-preview, gpt-4-0125-preview, gpt-4-1106-preview, gpt-4-0314, gpt-4-0613, gpt-4-32k, gpt-4-32k-0314, gpt-4-32k-0613, gpt-3.5-turbo-16k, gpt-3.5-turbo-16k-0613, gpt-3.5-turbo, gpt-3.5-turbo-0301, gpt-3.5-turbo-0613, text-davinci-003, text-davinci-002, code-davinci-002
       OPENAI_API_MODEL: xxx
       # reverse proxy, optional
       API_REVERSE_PROXY: xxx
diff --git a/README.zh.md b/README.zh.md
index 26141c9..ceabef7 100644
--- a/README.zh.md
+++ b/README.zh.md
@@ -220,7 +220,7 @@ services:
       # API接口地址，可选，设置 OPENAI_API_KEY 时可用
       OPENAI_API_BASE_URL: xxx
       # API模型，可选，设置 OPENAI_API_KEY 时可用，https://platform.openai.com/docs/models
-      # gpt-4, gpt-4-turbo, gpt-4-turbo-preview, gpt-4-0125-preview, gpt-4-1106-preview, gpt-4-0314, gpt-4-0613, gpt-4-32k, gpt-4-32k-0314, gpt-4-32k-0613, gpt-3.5-turbo-16k, gpt-3.5-turbo-16k-0613, gpt-3.5-turbo, gpt-3.5-turbo-0301, gpt-3.5-turbo-0613, text-davinci-003, text-davinci-002, code-davinci-002
+      # gpt-4, gpt-4o, gpt-4-turbo, gpt-4-turbo-preview, gpt-4-0125-preview, gpt-4-1106-preview, gpt-4-0314, gpt-4-0613, gpt-4-32k, gpt-4-32k-0314, gpt-4-32k-0613, gpt-3.5-turbo-16k, gpt-3.5-turbo-16k-0613, gpt-3.5-turbo, gpt-3.5-turbo-0301, gpt-3.5-turbo-0613, text-davinci-003, text-davinci-002, code-davinci-002
       OPENAI_API_MODEL: xxx
       # 反向代理，可选
       API_REVERSE_PROXY: xxx
diff --git a/service/src/chatgpt/index.ts b/service/src/chatgpt/index.ts
index 6c2a597..72aba69 100644
--- a/service/src/chatgpt/index.ts
+++ b/service/src/chatgpt/index.ts
@@ -53,8 +53,8 @@ let api: ChatGPTAPI | ChatGPTUnofficialProxyAPI
         options.maxModelTokens = 32768
         options.maxResponseTokens = 8192
       }
-      // if use GPT-4 Turbo
-      else if (/-preview|-turbo/.test(model.toLowerCase())) {
+      // if use GPT-4 Turbo or GPT-4o
+      else if (/-preview|-turbo|-o/.test(model.toLowerCase())) {
         options.maxModelTokens = 128000
         options.maxResponseTokens = 4096
       }