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Review the following code diff in the file "g4f/Provider/ChatGpt.py" and take the pull request title and description into account when writing the response.
  
Pull request title: [pull] main from xtekky:main
Pull request description:
---
See Commits and Changes for more details.

-----
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---

Each line is prefixed by its number. Code to review:
```
3: from ..typing import Messages, CreateResult
4: from ..providers.base_provider import AbstractProvider, ProviderModelMixin
5: 
-import time, uuid, random, json
6:+import time
7:+import uuid
8:+import random
9:+import json
10: from requests import Session
11: 
12: from .openai.new import (
75: 
76: class ChatGpt(AbstractProvider, ProviderModelMixin):
77:     label = "ChatGpt"
78:+    url = "https://chatgpt.com"
79:     working = True
80:     supports_message_history = True
81:     supports_system_message = True
82:     supports_stream = True
83:+    default_model = 'auto'
84:     models = [
85:+        default_model,
86:+        'gpt-3.5-turbo',
87:         'gpt-4o',
88:         'gpt-4o-mini',
89:         'gpt-4',
90:         'gpt-4-turbo',
91:         'chatgpt-4o-latest',
92:     ]
93:+    
94:+    model_aliases = {
95:+        "gpt-4o": "chatgpt-4o-latest",
96:+    }
97:+    
98:+    @classmethod
99:+    def get_model(cls, model: str) -> str:
100:+        if model in cls.models:
101:+            return model
102:+        elif model in cls.model_aliases:
103:+            return cls.model_aliases[model]
104:+        else:
105:+            return cls.default_model
106: 
107:     @classmethod
108:     def create_completion(
112:         stream: bool,
113:         **kwargs
114:     ) -> CreateResult:
115:+        model = cls.get_model(model)
116:+        if model not in cls.models:
117:+            raise ValueError(f"Model '{model}' is not available. Available models: {', '.join(cls.models)}")
118:+
119:         
-        if model in [
-            'gpt-4o',
-            'gpt-4o-mini',
-            'gpt-4',
-            'gpt-4-turbo',
-            'chatgpt-4o-latest'
-        ]:
-            model = 'auto'
-        
-        elif model in [
-            'gpt-3.5-turbo'
-        ]:
-            model = 'text-davinci-002-render-sha'
-            
-        else:
-            raise ValueError(f"Invalid model: {model}")
-        
-        user_agent       = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36'
120:+        user_agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36'
121:         session: Session = init_session(user_agent)
122:         
-        config   = get_config(user_agent)
-        pow_req  = get_requirements_token(config)
-        headers  = { 
123:+        config = get_config(user_agent)
124:+        pow_req = get_requirements_token(config)
125:+        headers = { 
126:             'accept': '*/*',
127:             'accept-language': 'en-US,en;q=0.8',
128:             'content-type': 'application/json',
141:         }
142:         
143:         response = session.post('https://chatgpt.com/backend-anon/sentinel/chat-requirements',
-            headers=headers, json={'p': pow_req})
144:+                                 headers=headers, json={'p': pow_req})
145: 
146:         if response.status_code != 200:
-            print(f"Request failed with status: {response.status_code}")
-            print(f"Response content: {response.content}")
147:             return
148: 
149:         response_data = response.json()
150:         if "detail" in response_data and "Unusual activity" in response_data["detail"]:
-            print(f"Blocked due to unusual activity: {response_data['detail']}")
151:             return
152:         
-        turnstile          = response_data.get('turnstile', {})
153:+        turnstile = response_data.get('turnstile', {})
154:         turnstile_required = turnstile.get('required')
-        pow_conf           = response_data.get('proofofwork', {})
155:+        pow_conf = response_data.get('proofofwork', {})
156: 
157:         if turnstile_required:
-            turnstile_dx    = turnstile.get('dx')
158:+            turnstile_dx = turnstile.get('dx')
159:             turnstile_token = process_turnstile(turnstile_dx, pow_req)
160:         
-        headers = headers | {
-            'openai-sentinel-turnstile-token'        : turnstile_token,
-            'openai-sentinel-chat-requirements-token': response_data.get('token'),
-            'openai-sentinel-proof-token'            : get_answer_token(
-                pow_conf.get('seed'), pow_conf.get('difficulty'), config
-            )
-        }
-        
161:+        headers = {**headers, 
162:+                   'openai-sentinel-turnstile-token': turnstile_token,
163:+                   'openai-sentinel-chat-requirements-token': response_data.get('token'),
164:+                   'openai-sentinel-proof-token': get_answer_token(
165:+                       pow_conf.get('seed'), pow_conf.get('difficulty'), config
166:+                   )}
167:+
168:         json_data = {
169:             'action': 'next',
170:             'messages': format_conversation(messages),
171:             'parent_message_id': str(uuid.uuid4()),
-            'model': 'auto',
172:+            'model': model,
173:             'timezone_offset_min': -120,
174:             'suggestions': [
175:                 'Can you help me create a personalized morning routine that would help increase my productivity throughout the day? Start by asking me about my current habits and what activities energize me in the morning.',
192:             'conversation_origin': None,
193:             'client_contextual_info': {
194:                 'is_dark_mode': True,
-                'time_since_loaded': random.randint(22,33),
195:+                'time_since_loaded': random.randint(22, 33),
196:                 'page_height': random.randint(600, 900),
197:                 'page_width': random.randint(500, 800),
198:                 'pixel_ratio': 2,
204:         time.sleep(2)
205:         
206:         response = session.post('https://chatgpt.com/backend-anon/conversation',
-            headers=headers, json=json_data, stream=True)
207:+                                 headers=headers, json=json_data, stream=True)
208: 
209:         replace = ''
210:         for line in response.iter_lines():
211:             if line:
212:                 decoded_line = line.decode()
-                print(f"Received line: {decoded_line}")
213:+
214:                 if decoded_line.startswith('data:'):
-                    json_string = decoded_line[6:]
-                    if json_string.strip():
215:+                    json_string = decoded_line[6:].strip()
216:+
217:+                    if json_string == '[DONE]':
218:+                        break
219:+                    
220:+                    if json_string:
221:                         try:
222:                             data = json.loads(json_string)
-                        except json.JSONDecodeError as e:
-                            print(f"Error decoding JSON: {e}, content: {json_string}")
223:+                        except json.JSONDecodeError:
224:                             continue
225:                         
-                        if data.get('message').get('author').get('role') == 'assistant':
-                            tokens = (data.get('message').get('content').get('parts')[0])
-                            
-                            yield tokens.replace(replace, '')
-                            
-                            replace = tokens
226:+                        if data.get('message') and data['message'].get('author'):
227:+                            role = data['message']['author'].get('role')
228:+                            if role == 'assistant':
229:+                                tokens = data['message']['content'].get('parts', [])
230:+                                if tokens:
231:+                                    yield tokens[0].replace(replace, '')
232:+                                    replace = tokens[0]
```