Skip to content

Processor fails for mistralai/Voxtral-Mini-3B-2507 #44841

New issue
New issue
Open
Open
Processor fails for mistralai/Voxtral-Mini-3B-2507#44841
Labels
bug
@BhavyaShah1234

Description

@BhavyaShah1234
BhavyaShah1234
opened on Mar 19, 2026

System Info

I am trying to run inference using mistralai/Voxtral-Mini-3B-2507 on an audio (np.ndarray). On loading the processor using processor = transformers.AutoProcessor.from_pretrained(MODEL, trust_remote_code=True), I am getting the following error:

/usr/local/lib/python3.12/dist-packages/huggingface_hub/utils/_auth.py:94: UserWarning: 
The secret `HF_TOKEN` does not exist in your Colab secrets.
To authenticate with the Hugging Face Hub, create a token in your settings tab (https://huggingface.co/settings/tokens), set it as secret in your Google Colab and restart your session.
You will be able to reuse this secret in all of your notebooks.
Please note that authentication is recommended but still optional to access public models or datasets.
  warnings.warn(
Converting tekken.json to tokenizer.json: 100%|██████████| 150000/150000 [00:02<00:00, 69142.59it/s]
---------------------------------------------------------------------------
Exception                                 Traceback (most recent call last)
[/tmp/ipykernel_7845/2744582412.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in <cell line: 0>()
     12 # else:
     13 #     processor = MODEL_DICT[MODEL]['processor'].from_pretrained(MODEL, trust_remote_code=True)
---> 14 processor = MODEL_DICT[MODEL]['processor'].from_pretrained(MODEL, trust_remote_code=True)

13 frames[/usr/local/lib/python3.12/dist-packages/transformers/models/auto/processing_auto.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in from_pretrained(cls, pretrained_model_name_or_path, **kwargs)
    409             )
    410         elif processor_class is not None:
--> 411             return processor_class.from_pretrained(
    412                 pretrained_model_name_or_path, trust_remote_code=trust_remote_code, **kwargs
    413             )

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in from_pretrained(cls, pretrained_model_name_or_path, cache_dir, force_download, local_files_only, token, revision, **kwargs)
   1402         processor_dict, instantiation_kwargs = cls.get_processor_dict(pretrained_model_name_or_path, **kwargs)
   1403         args = cls._get_arguments_from_pretrained(pretrained_model_name_or_path, processor_dict, **kwargs)
-> 1404         return cls.from_args_and_dict(args, processor_dict, **instantiation_kwargs)
   1405 
   1406     @classmethod

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in from_args_and_dict(cls, args, processor_dict, **kwargs)
   1171         processor = cls(*args, **valid_kwargs)
   1172 
-> 1173         logger.info(f"Processor {processor}")
   1174         if return_unused_kwargs:
   1175             return processor, unused_kwargs

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in __repr__(self)
    777         attributes_repr = [f"- {name}: {repr(getattr(self, name))}" for name in self.get_attributes()]
    778         attributes_repr = "\n".join(attributes_repr)
--> 779         return f"{self.__class__.__name__}:\n{attributes_repr}\n\n{self.to_json_string()}"
    780 
    781     def save_pretrained(self, save_directory, push_to_hub: bool = False, **kwargs):

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in to_json_string(self)
    759             `str`: String containing all the attributes that make up this feature_extractor instance in JSON format.
    760         """
--> 761         dictionary = self.to_dict()
    762 
    763         return json.dumps(dictionary, indent=2, sort_keys=True) + "\n"

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in to_dict(self)
    697             `dict[str, Any]`: Dictionary of all the attributes that make up this processor instance.
    698         """
--> 699         output = copy.deepcopy(self.__dict__)
    700 
    701         # Get the kwargs in `__init__`.

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in deepcopy(x, memo, _nil)
    134     copier = _deepcopy_dispatch.get(cls)
    135     if copier is not None:
--> 136         y = copier(x, memo)
    137     else:
    138         if issubclass(cls, type):

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in _deepcopy_dict(x, memo, deepcopy)
    219     memo[id(x)] = y
    220     for key, value in x.items():
--> 221         y[deepcopy(key, memo)] = deepcopy(value, memo)
    222     return y
    223 d[dict] = _deepcopy_dict

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in deepcopy(x, memo, _nil)
    160                     y = x
    161                 else:
--> 162                     y = _reconstruct(x, memo, *rv)
    163 
    164     # If is its own copy, don't memoize.

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in _reconstruct(x, memo, func, args, state, listiter, dictiter, deepcopy)
    257     if state is not None:
    258         if deep:
--> 259             state = deepcopy(state, memo)
    260         if hasattr(y, '__setstate__'):
    261             y.__setstate__(state)

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in deepcopy(x, memo, _nil)
    134     copier = _deepcopy_dispatch.get(cls)
    135     if copier is not None:
--> 136         y = copier(x, memo)
    137     else:
    138         if issubclass(cls, type):

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in _deepcopy_dict(x, memo, deepcopy)
    219     memo[id(x)] = y
    220     for key, value in x.items():
--> 221         y[deepcopy(key, memo)] = deepcopy(value, memo)
    222     return y
    223 d[dict] = _deepcopy_dict

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in deepcopy(x, memo, _nil)
    160                     y = x
    161                 else:
--> 162                     y = _reconstruct(x, memo, *rv)
    163 
    164     # If is its own copy, don't memoize.

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in _reconstruct(x, memo, func, args, state, listiter, dictiter, deepcopy)
    259             state = deepcopy(state, memo)
    260         if hasattr(y, '__setstate__'):
--> 261             y.__setstate__(state)
    262         else:
    263             if isinstance(state, tuple) and len(state) == 2:

Exception: Error while attempting to unpickle Tokenizer: Token `Ġ<SPECIAL_116>` out of vocabulary at line 1 column 9601910

I tested out the following standalone code provided in the model card of mistralai/Voxtral-Mini-3B-2507 but it too does not work:

from transformers import VoxtralForConditionalGeneration, AutoProcessor
import torch

device = "cuda"
repo_id = "mistralai/Voxtral-Mini-3B-2507"

processor = AutoProcessor.from_pretrained(repo_id)
model = VoxtralForConditionalGeneration.from_pretrained(repo_id, torch_dtype=torch.bfloat16, device_map=device)

conversation = [
    {
        "role": "user",
        "content": [
            {
                "type": "audio",
                "path": "https://huggingface.co/datasets/hf-internal-testing/dummy-audio-samples/resolve/main/winning_call.mp3",
            },
        ],
    }
]

inputs = processor.apply_chat_template(conversation)
inputs = inputs.to(device, dtype=torch.bfloat16)

outputs = model.generate(**inputs, max_new_tokens=500)
decoded_outputs = processor.batch_decode(outputs[:, inputs.input_ids.shape[1]:], skip_special_tokens=True)

print("\nGenerated response:")
print("=" * 80)
print(decoded_outputs[0])
print("=" * 80)

Error given by above script:

Converting tekken.json to tokenizer.json: 100%|██████████| 150000/150000 [00:01<00:00, 116597.64it/s]
---------------------------------------------------------------------------
Exception                                 Traceback (most recent call last)
[/tmp/ipykernel_7845/3351359521.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in <cell line: 0>()
      5 repo_id = "mistralai/Voxtral-Mini-3B-2507"
      6 
----> 7 processor = AutoProcessor.from_pretrained(repo_id)
      8 model = VoxtralForConditionalGeneration.from_pretrained(repo_id, torch_dtype=torch.bfloat16, device_map=device)
      9 

13 frames[/usr/local/lib/python3.12/dist-packages/transformers/models/auto/processing_auto.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in from_pretrained(cls, pretrained_model_name_or_path, **kwargs)
    409             )
    410         elif processor_class is not None:
--> 411             return processor_class.from_pretrained(
    412                 pretrained_model_name_or_path, trust_remote_code=trust_remote_code, **kwargs
    413             )

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in from_pretrained(cls, pretrained_model_name_or_path, cache_dir, force_download, local_files_only, token, revision, **kwargs)
   1402         processor_dict, instantiation_kwargs = cls.get_processor_dict(pretrained_model_name_or_path, **kwargs)
   1403         args = cls._get_arguments_from_pretrained(pretrained_model_name_or_path, processor_dict, **kwargs)
-> 1404         return cls.from_args_and_dict(args, processor_dict, **instantiation_kwargs)
   1405 
   1406     @classmethod

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in from_args_and_dict(cls, args, processor_dict, **kwargs)
   1171         processor = cls(*args, **valid_kwargs)
   1172 
-> 1173         logger.info(f"Processor {processor}")
   1174         if return_unused_kwargs:
   1175             return processor, unused_kwargs

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in __repr__(self)
    777         attributes_repr = [f"- {name}: {repr(getattr(self, name))}" for name in self.get_attributes()]
    778         attributes_repr = "\n".join(attributes_repr)
--> 779         return f"{self.__class__.__name__}:\n{attributes_repr}\n\n{self.to_json_string()}"
    780 
    781     def save_pretrained(self, save_directory, push_to_hub: bool = False, **kwargs):

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in to_json_string(self)
    759             `str`: String containing all the attributes that make up this feature_extractor instance in JSON format.
    760         """
--> 761         dictionary = self.to_dict()
    762 
    763         return json.dumps(dictionary, indent=2, sort_keys=True) + "\n"

[/usr/local/lib/python3.12/dist-packages/transformers/processing_utils.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in to_dict(self)
    697             `dict[str, Any]`: Dictionary of all the attributes that make up this processor instance.
    698         """
--> 699         output = copy.deepcopy(self.__dict__)
    700 
    701         # Get the kwargs in `__init__`.

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in deepcopy(x, memo, _nil)
    134     copier = _deepcopy_dispatch.get(cls)
    135     if copier is not None:
--> 136         y = copier(x, memo)
    137     else:
    138         if issubclass(cls, type):

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in _deepcopy_dict(x, memo, deepcopy)
    219     memo[id(x)] = y
    220     for key, value in x.items():
--> 221         y[deepcopy(key, memo)] = deepcopy(value, memo)
    222     return y
    223 d[dict] = _deepcopy_dict

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in deepcopy(x, memo, _nil)
    160                     y = x
    161                 else:
--> 162                     y = _reconstruct(x, memo, *rv)
    163 
    164     # If is its own copy, don't memoize.

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in _reconstruct(x, memo, func, args, state, listiter, dictiter, deepcopy)
    257     if state is not None:
    258         if deep:
--> 259             state = deepcopy(state, memo)
    260         if hasattr(y, '__setstate__'):
    261             y.__setstate__(state)

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in deepcopy(x, memo, _nil)
    134     copier = _deepcopy_dispatch.get(cls)
    135     if copier is not None:
--> 136         y = copier(x, memo)
    137     else:
    138         if issubclass(cls, type):

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in _deepcopy_dict(x, memo, deepcopy)
    219     memo[id(x)] = y
    220     for key, value in x.items():
--> 221         y[deepcopy(key, memo)] = deepcopy(value, memo)
    222     return y
    223 d[dict] = _deepcopy_dict

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in deepcopy(x, memo, _nil)
    160                     y = x
    161                 else:
--> 162                     y = _reconstruct(x, memo, *rv)
    163 
    164     # If is its own copy, don't memoize.

[/usr/lib/python3.12/copy.py](https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD#) in _reconstruct(x, memo, func, args, state, listiter, dictiter, deepcopy)
    259             state = deepcopy(state, memo)
    260         if hasattr(y, '__setstate__'):
--> 261             y.__setstate__(state)
    262         else:
    263             if isinstance(state, tuple) and len(state) == 2:

Exception: Error while attempting to unpickle Tokenizer: Token `<SPECIAL_32><SPECIAL_32>` out of vocabulary at line 1 column 9847997

There are many issues with a lot of other APIs in transformers==5.3.0. Please resolve these issues ASAP.

Who can help?

@eustlb @ebezzam @vasqu @Cyrilvallez

Information

  • The official example scripts
  • My own modified scripts

Tasks

  • An officially supported task in the examples folder (such as GLUE/SQuAD, ...)
  • My own task or dataset (give details below)

Reproduction

Steps to reproduce the issue:

  1. Connect to the correct GPU runtime (I tried on T4 GPU).
  2. Upload a valid audio file with extension .WAV.
  3. Ensure MODEL = "mistralai/Voxtral-Mini-3B-2507" and AUDIO_PATH = "<valid audio path>.WAV".
  4. Run the notebook at https://colab.research.google.com/drive/18tlO4aFg0RxV7hcBf04abb1wKW-B3zbD?usp=sharing.

EMSCall (1).ipynb

Expected behavior

Error on loading of processor for mistralai/Voxtral-Mini-3B-2507 model.

Metadata

Metadata

Assignees

No one assigned

    Labels

    bug

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions