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Model: erwanf/gpt2-mini
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---
license: mit
datasets:
- Skylion007/openwebtext
language:
- en
metrics:
- perplexity
pipeline_tag: text-generation
---
# GPT-2 Mini
A smaller GPT-2 model with (only) 39M parameters. It was pretrained on a subset of OpenWebText, the open-source version of the pretraining dataset used by OpenAI for the original GPT-2 models.
## Uses
The purpose of this model is mainly for research and education. Its small size allows for fast experiments in resource-limited settings, while still being able of generating complex and coherent text.
## Getting Started
Use the code below to get started with the model:
```py
from transformers import AutoModelForCausalLM, AutoTokenizer
# Load model
model = AutoModelForCausalLM.from_pretrained("erwanf/gpt2-mini")
model.eval()
# Load tokenizer
tokenizer = AutoTokenizer.from_pretrained("erwanf/gpt2-mini")
# Generate text
prompt = "Hello, I'm a language model,"
input_ids = tokenizer.encode(prompt, return_tensors="pt")
output = model.generate(input_ids, do_sample=True, max_length=50, num_return_sequences=5)
output_text = tokenizer.batch_decode(output, skip_special_tokens=True)
print(output_text)
```
Output:
```
["Hello, I'm a language model, I can't be more efficient in words.\n\nYou can use this as a point to find out the next bit in your system, and learn more about me.\n\nI think a lot of the",
"Hello, I'm a language model, my teacher is a good teacher - a good school teacher and one thing you have to remember:\n\nIt's not perfect. A school is not perfect; it isn't perfect at all!\n\n",
'Hello, I\'m a language model, but if I can do something for you then go for it (for a word). Here is my blog, the language:\n\nI\'ve not used "normal" in English words, but I\'ve always',
'Hello, I\'m a language model, I\'m talking to you the very first time I used a dictionary and it can be much better than one word in my dictionary. What would an "abnormal" English dictionary have to do with a dictionary and',
'Hello, I\'m a language model, the most powerful representation of words and phrases in the language I\'m using."\n\nThe new rules change that makes it much harder for people to understand a language that does not have a native grammar (even with']
```
## Training Details
The architecture relies on the GPT-2 model, with smaller dimensions and less layers. It uses the same tokenizer as GPT-2. We used the first 2M rows from the OpenWebText dataset, out of which we use 1k for test and validation sets.
### Hyperparameters
| **Hyperparameter** | **Value** |
|------------------------|------------------|
| **Model Parameters** | |
| Vocabulary Size | 50,257 |
| Context Length | 512 |
| Number of Layers | 4 |
| Hidden Size | 512 |
| Number of Attention Heads | 8 |
| Intermediate Size | 2048 |
| Activation Function | GELU |
| Dropout | No |
| **Training Parameters**| |
| Learning Rate | 5e-4 |
| Batch Size | 256 |
| Optimizer | AdamW |
| beta1 | 0.9 |
| beta2 | 0.98 |
| Weight Decay | 0.1 |
| Training Steps | 100,000 |
| Warmup Steps | 4,000 |
| Learning Rate Scheduler| Cosine |
| Training Dataset Size | 1M samples |
| Validation Dataset Size| 1k samples |
| Float Type | bf16 |

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{
"_name_or_path": "./outputs/gpt2_mini2/checkpoint-100000",
"activation_function": "gelu_new",
"architectures": [
"GPT2LMHeadModel"
],
"attn_pdrop": 0.0,
"bos_token_id": 50256,
"embd_pdrop": 0.0,
"eos_token_id": 50256,
"initializer_range": 0.02,
"layer_norm_epsilon": 1e-05,
"model_type": "gpt2",
"n_embd": 512,
"n_head": 8,
"n_inner": 2048,
"n_layer": 4,
"n_positions": 512,
"pad_token_id": 50256,
"reorder_and_upcast_attn": false,
"resid_pdrop": 0.0,
"scale_attn_by_inverse_layer_idx": false,
"scale_attn_weights": true,
"summary_activation": null,
"summary_first_dropout": 0.1,
"summary_proj_to_labels": true,
"summary_type": "cls_index",
"summary_use_proj": true,
"torch_dtype": "float32",
"transformers_version": "4.41.2",
"use_cache": true,
"vocab_size": 50257
}

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{
"_from_model_config": true,
"bos_token_id": 50256,
"eos_token_id": 50256,
"pad_token_id": 50256,
"transformers_version": "4.41.2"
}

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{
"bos_token": {
"content": "<|endoftext|>",
"lstrip": false,
"normalized": true,
"rstrip": false,
"single_word": false
},
"eos_token": {
"content": "<|endoftext|>",
"lstrip": false,
"normalized": true,
"rstrip": false,
"single_word": false
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"unk_token": {
"content": "<|endoftext|>",
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{
"add_bos_token": false,
"add_prefix_space": false,
"added_tokens_decoder": {
"50256": {
"content": "<|endoftext|>",
"lstrip": false,
"normalized": true,
"rstrip": false,
"single_word": false,
"special": true
}
},
"bos_token": "<|endoftext|>",
"clean_up_tokenization_spaces": true,
"eos_token": "<|endoftext|>",
"errors": "replace",
"model_max_length": 1024,
"pad_token": null,
"tokenizer_class": "GPT2Tokenizer",
"unk_token": "<|endoftext|>"
}

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