@@ -124,7 +124,7 @@ class Chatgpt(SimpleService):
                 raise FileUploadUnsupported
             file_service = FileProcessingService
             file_bytes = input_message.file.read()
-            kind = filetype.guess(file_bytes[:20])
+            kind = filetype.guess(file_bytes[:550])
             if not kind:
                 raise CorruptedFileError
             raw_file_extension = kind.extension
@@ -109,7 +109,7 @@ class Chatgpt_5(Chatgpt):
         if file:
             file_service = FileProcessingService
             file_bytes = input_message.file.read()
-            kind = filetype.guess(file_bytes[:20])
+            kind = filetype.guess(file_bytes[:550])
             if not kind:
                 raise CorruptedFileError
             raw_file_extension = kind.extension
@@ -124,7 +124,7 @@ class Chatgpt_5_4(Chatgpt):
         if file:
             file_service = FileProcessingService
             file_bytes = input_message.file.read()
-            kind = filetype.guess(file_bytes[:20])
+            kind = filetype.guess(file_bytes[:550])
             if not kind:
                 raise CorruptedFileError
             raw_file_extension = kind.extension
@@ -79,7 +79,7 @@ class Claude(SimpleService):
             file_service = FileProcessingService
             try:
                 file_bytes = input_message.file.read()
-                kind = filetype.guess(file_bytes[:20])
+                kind = filetype.guess(file_bytes[:550])
                 raw_file_extension = kind.extension
                 file_extension = file_service.get_file_extension(raw_file_extension, file_bytes)
                 if file_extension in ('pdf', 'doc', 'docx', 'xlsx'):
@@ -136,7 +136,7 @@ class Gemini(SimpleService):
         if file:
             file_service = FileProcessingService
             file_bytes = input_message.file.read()
-            kind = filetype.guess(file_bytes[:20])
+            kind = filetype.guess(file_bytes[:550])
             raw_file_extension = kind.extension
             file_extension = file_service.get_file_extension(raw_file_extension, file_bytes)
             if file_extension in ('pdf', 'doc', 'docx', 'xlsx'):
@@ -86,7 +86,7 @@ class Gemini_3_1(SimpleService):
         if input_message.file:
             file_service = FileProcessingService
             file_bytes = input_message.file.read()
-            kind = filetype.guess(file_bytes[:20])
+            kind = filetype.guess(file_bytes[:550])
             raw_file_extension = kind.extension
             file_extension = file_service.get_file_extension(raw_file_extension, file_bytes)
             if file_extension in ('pdf', 'doc', 'docx', 'xlsx'):
@@ -57,7 +57,7 @@ class Grok_4_1_Fast(SimpleService):
         if input_message.file:
             file_service = FileProcessingService
             file_bytes = input_message.file.read()
-            kind = filetype.guess(file_bytes[:20])
+            kind = filetype.guess(file_bytes[:550])
             if not kind:
                 raise CorruptedFileError
             raw_file_extension = kind.extension
@@ -27,8 +27,8 @@ class Qwen_3_6(SimpleService):
     }
 
     TOKENS_COST = {
-        'qwen3.6-flash': {'input': Decimal('125'), 'output': Decimal('500')},
-        'qwen3.6-35b-a3b': {'input': Decimal('175'), 'output': Decimal('1000')},
+        'qwen3.6-flash': {'input': Decimal('125'), 'output': Decimal('750')},
+        'qwen3.6-35b-a3b': {'input': Decimal('115'), 'output': Decimal('900')},
         'qwen3.6-plus': {'input': Decimal('250'), 'output': Decimal('1500')},
     }
 
@@ -70,7 +70,7 @@ class Qwen_3_6(SimpleService):
         if input_message.file:
             file_service = FileProcessingService
             file_bytes = input_message.file.read()
-            kind = filetype.guess(file_bytes[:20])
+            kind = filetype.guess(file_bytes[:550])
             raw_file_extension = kind.extension
             file_extension = file_service.get_file_extension(raw_file_extension, file_bytes)
             if file_extension in ('pdf', 'doc', 'docx', 'xlsx'):
@@ -80,7 +80,7 @@ class Raifgpt(Chatgpt):
         if file:
             file_service = FileProcessingService
             file_bytes = file.read()
-            kind = filetype.guess(file_bytes[:20])
+            kind = filetype.guess(file_bytes[:550])
             if not kind:
                 raise CorruptedFileError
             raw_file_extension = kind.extension
@@ -14,7 +14,6 @@ from yookassa.domain.response import PaymentResponse as YookassaPaymentResponse
 
 from authentication.models import CustomUserModel
 from lib.unleash.client import web_client
-from payments.exceptions.full_balance import FullBalanceException
 from payments.models.payment import Payment as PaymentModel
 from payments.models.payment_plan import PaymentPlan, PaymentPlanUserInfo
 from payments.services.payment_method_service import PaymentMethodService
@@ -49,7 +48,6 @@ class PaymentService:
         )
         payment_data = {
             'amount': {'value': f'{plan.price}', 'currency': 'RUB'},
-            'payment_method_data': {'type': 'bank_card'},
             'receipt': receipt_data,
             'confirmation': {
                 'type': 'redirect',