diff --git a/README.en.md b/README.en.md
index 87e002a..db90449 100644
--- a/README.en.md
+++ b/README.en.md
@@ -168,7 +168,7 @@ pnpm dev
 - `OPENAI_API_KEY` one of two
 - `OPENAI_ACCESS_TOKEN` one of two, `OPENAI_API_KEY` takes precedence when both are present
 - `OPENAI_API_BASE_URL` optional, available when `OPENAI_API_KEY` is set
-- `OPENAI_API_Model` optional, available when `OPENAI_API_KEY` is set
+- `OPENAI_API_MODEL` optional, available when `OPENAI_API_KEY` is set
 - `API_REVERSE_PROXY` optional, available when `OPENAI_ACCESS_TOKEN` is set [Reference](#introduction)
 - `AUTH_SECRET_KEY` Access Password，optional
 - `TIMEOUT_MS` timeout, in milliseconds, optional
@@ -212,7 +212,7 @@ services:
       # api interface url, optional, available when OPENAI_API_KEY is set
       OPENAI_API_BASE_URL: xxxx
       # api model, optional, available when OPENAI_API_KEY is set
-      OPENAI_API_Model: xxxx
+      OPENAI_API_MODEL: xxxx
       # reverse proxy, optional
       API_REVERSE_PROXY: xxx
       # access password，optional
@@ -225,7 +225,7 @@ services:
       SOCKS_PROXY_PORT: xxxx
 ```
 The `OPENAI_API_BASE_URL` is optional and only used when setting the `OPENAI_API_KEY`.
-The `OPENAI_API_Model` is optional and only used when setting the `OPENAI_API_KEY`.
+The `OPENAI_API_MODEL` is optional and only used when setting the `OPENAI_API_KEY`.
 
 ### Deployment with Railway
 
@@ -241,7 +241,7 @@ The `OPENAI_API_Model` is optional and only used when setting the `OPENAI_API_KE
 | `OPENAI_API_KEY`     | Optional | Required for `OpenAI API`. `apiKey` can be obtained from [here](https://platform.openai.com/overview). |
 | `OPENAI_ACCESS_TOKEN`| Optional | Required for `Web API`. `accessToken` can be obtained from [here](https://chat.openai.com/api/auth/session).|
 | `OPENAI_API_BASE_URL`  | Optional, only for `OpenAI API` |  API endpoint.                                                        |
-| `OPENAI_API_Model`  | Optional, only for `OpenAI API` |  API model.                                                        |
+| `OPENAI_API_MODEL`  | Optional, only for `OpenAI API` |  API model.                                                        |
 | `API_REVERSE_PROXY`  | Optional, only for `Web API` | Reverse proxy address for `Web API`. [Details](https://github.com/transitive-bullshit/chatgpt-api#reverse-proxy) |
 | `SOCKS_PROXY_HOST`   | Optional, effective with `SOCKS_PROXY_PORT` | Socks proxy.                      |
 | `SOCKS_PROXY_PORT`   | Optional, effective with `SOCKS_PROXY_HOST` | Socks proxy port.                 |
diff --git a/README.md b/README.md
index a8b8b58..91dea4c 100644
--- a/README.md
+++ b/README.md
@@ -166,7 +166,7 @@ pnpm dev
 - `OPENAI_API_KEY` 二选一
 - `OPENAI_ACCESS_TOKEN`  二选一，同时存在时，`OPENAI_API_KEY` 优先
 - `OPENAI_API_BASE_URL`  可选，设置 `OPENAI_API_KEY` 时可用
-- `OPENAI_API_Model`  可选，设置 `OPENAI_API_KEY` 时可用
+- `OPENAI_API_MODEL`  可选，设置 `OPENAI_API_KEY` 时可用
 - `API_REVERSE_PROXY` 可选，设置 `OPENAI_ACCESS_TOKEN` 时可用 [参考](#介绍)
 - `AUTH_SECRET_KEY` 访问权限密钥，可选
 - `TIMEOUT_MS` 超时，单位毫秒，可选
@@ -210,7 +210,7 @@ services:
       # API接口地址，可选，设置 OPENAI_API_KEY 时可用
       OPENAI_API_BASE_URL: xxxx
       # API模型，可选，设置 OPENAI_API_KEY 时可用
-      OPENAI_API_Model: xxxx
+      OPENAI_API_MODEL: xxxx
       # 反向代理，可选
       API_REVERSE_PROXY: xxx
       # 访问权限密钥，可选
@@ -223,7 +223,7 @@ services:
       SOCKS_PROXY_PORT: xxxx
 ```
 - `OPENAI_API_BASE_URL`  可选，设置 `OPENAI_API_KEY` 时可用
-- `OPENAI_API_Model`  可选，设置 `OPENAI_API_KEY` 时可用
+- `OPENAI_API_MODEL`  可选，设置 `OPENAI_API_KEY` 时可用
 ###  使用 Railway 部署
 
 [![Deploy on Railway](https://railway.app/button.svg)](https://railway.app/new/template/yytmgc)
@@ -238,7 +238,7 @@ services:
 | `OPENAI_API_KEY`      | `OpenAI API` 二选一    | 使用 `OpenAI API` 所需的 `apiKey` [(获取 apiKey)](https://platform.openai.com/overview)            |
 | `OPENAI_ACCESS_TOKEN` | `Web API` 二选一       | 使用 `Web API` 所需的 `accessToken` [(获取 accessToken)](https://chat.openai.com/api/auth/session) |
 | `OPENAI_API_BASE_URL`   | 可选，`OpenAI API` 时可用 |  `API`接口地址  |
-| `OPENAI_API_Model`   | 可选，`OpenAI API` 时可用 |  `API`模型  |
+| `OPENAI_API_MODEL`   | 可选，`OpenAI API` 时可用 |  `API`模型  |
 | `API_REVERSE_PROXY`   | 可选，`Web API` 时可用 | `Web API` 反向代理地址 [详情](https://github.com/transitive-bullshit/chatgpt-api#reverse-proxy)    |
 | `SOCKS_PROXY_HOST`   | 可选，和 `SOCKS_PROXY_PORT` 一起时生效 | Socks代理    |
 | `SOCKS_PROXY_PORT`   | 可选，和 `SOCKS_PROXY_HOST` 一起时生效 | Socks代理端口    |
diff --git a/service/.env.example b/service/.env.example
index 729d356..43fe3a6 100644
--- a/service/.env.example
+++ b/service/.env.example
@@ -8,7 +8,7 @@ OPENAI_ACCESS_TOKEN=
 OPENAI_API_BASE_URL=
 
 # OpenAI API Model - https://platform.openai.com/docs/models
-OPENAI_API_Model=
+OPENAI_API_MODEL=
 
 # Reverse Proxy
 API_REVERSE_PROXY=
diff --git a/service/src/chatgpt/index.ts b/service/src/chatgpt/index.ts
index 8641dc7..c1ab471 100644
--- a/service/src/chatgpt/index.ts
+++ b/service/src/chatgpt/index.ts
@@ -36,7 +36,7 @@ let api: ChatGPTAPI | ChatGPTUnofficialProxyAPI
     const options: ChatGPTAPIOptions = {
       apiKey: process.env.OPENAI_API_KEY,
       completionParams: {
-        model: process.env.OPENAI_API_Model ?? 'gpt-3.5-turbo',
+        model: process.env.OPENAI_API_MODEL ?? 'gpt-3.5-turbo',
       },
       debug: false,
     }