KeyError: 'gpt_neo' with EleutherAI/gpt-neo-1.3B
I am trying to try new GPT-3 checkpoint however I am getting an error on local and Google Colab platform as well.

Google Colab:
```
!pip install transformers

from transformers import AutoTokenizer, AutoModelForCausalLM
  
tokenizer = AutoTokenizer.from_pretrained("EleutherAI/gpt-neo-1.3B")
model = AutoModelForCausalLM.from_pretrained("EleutherAI/gpt-neo-1.3B")
```

The error I get is:

```
KeyError                                  Traceback (most recent call last)

<ipython-input-5-333740565b3a> in <module>()
      3 from transformers import AutoTokenizer, AutoModelForCausalLM
      4 
----> 5 tokenizer = AutoTokenizer.from_pretrained("EleutherAI/gpt-neo-1.3B")
      6 model = AutoModelForCausalLM.from_pretrained("EleutherAI/gpt-neo-1.3B")

1 frames

/usr/local/lib/python3.7/dist-packages/transformers/models/auto/configuration_auto.py in from_pretrained(cls, pretrained_model_name_or_path, **kwargs)
    387         config_dict, _ = PretrainedConfig.get_config_dict(pretrained_model_name_or_path, **kwargs)
    388         if "model_type" in config_dict:
--> 389             config_class = CONFIG_MAPPING[config_dict["model_type"]]
    390             return config_class.from_dict(config_dict, **kwargs)
    391         else:

KeyError: 'gpt_neo'
```
Hello! GPT Neo is available on the master branch, while you're installing the version v4.2.2.

You should change `pip install transformers` to `pip install git+https://github.com/huggingface/transformers` and reload your kernel<|||||>Doing so results in this error: 

```
>>> generator = pipeline('text-generation', model='EleutherAI/gpt-neo-2.7B')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\jerkm\AppData\Local\Programs\Python\Python38\lib\site-packages\transformers\pipelines\__init__.py", line 540, in pipeline
    framework, model = infer_framework_load_model(
  File "C:\Users\jerkm\AppData\Local\Programs\Python\Python38\lib\site-packages\transformers\pipelines\base.py", line 235, in infer_framework_load_model
    raise ValueError(f"Could not load model {model} with any of the following classes: {class_tuple}.")
ValueError: Could not load model EleutherAI/gpt-neo-2.7B with any of the following classes: (<class 'transformers.models.auto.modeling_tf_auto.TFAutoModelForCausalLM'>,).
```<|||||>I think this was resolved when I installed pytorch