[BUG] The gpt5 model of openai is not supported yet

### 📋 CheckList

- [x] I have searched existing issues to avoid duplicates
- [x] I am using a recently maintained version of Coze Loop
- [x] I have provided all required information
- [x] I understand this is a bug report and not a feature request
- [x] I have submitted this report in English (otherwise it will not be processed)

### 🐛 Bug Description

An error occurs when calling openai's gpt5 model

### 🔄 Steps to Reproduce

1. Configure openai's gpt5 model in the model configuration file
2. click 'run' button

### ✅ Expected Behavior

call return success

### ❌ Actual Behavior

call model failed,error, status code: 400, status: 400 Bad Request,message: Unsupported parameter: 'max_tokens' is not supported with this model. Use 'max_completion_tokens' instead.

### 🚨 Severity

None

### 🔧 Component

None

### 💻 Environment

_No response_

### 🔧 Go Environment

_No response_

### 📋 Logs

```shell

```

### 📝 Additional Context

_No response_