src/transformers/models/openai/modeling_openai.py/OpenAIGPTLMHeadModel/__init__
class OpenAIGPTLMHeadModel:    def __init__(self, config):
        super().__init__(config)
        self.transformer = OpenAIGPTModel(config)
        self.lm_head = nn.Linear(config.n_embd, config.vocab_size, bias=False)

        self.init_weights()