Learn Exporting and Deploying Models | Evaluation, Optimization, and Deployment

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When you are ready to move your fine-tuned transformer model from experimentation to real-world applications, it is essential to export the model and integrate it into your workflows for inference. Exporting a model typically means saving its architecture and learned weights to disk, so you can reload it later without retraining. Once exported, you can use the model for batch inference—processing a large set of data at once—or for real-time inference, such as responding instantly to user queries in a web application. The process involves saving the model, loading it in your deployment environment, and ensuring the inference pipeline matches your training setup, including preprocessing steps like tokenization.

Note

Always test your exported models on a variety of sample inputs before deploying to production. This helps catch any issues with serialization, preprocessing, or environmental differences that might affect predictions.


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from transformers import AutoTokenizer, AutoModelForSequenceClassification
import torch

# Load the exported (saved) model and tokenizer
model_path = "path/to/your/saved-model"
tokenizer = AutoTokenizer.from_pretrained(model_path)
model = AutoModelForSequenceClassification.from_pretrained(model_path)

# Example texts for inference
texts = [
    "Transformers are revolutionizing natural language processing.",
    "Fine-tuning allows models to adapt to specific tasks."
]

# Tokenize the texts for the model
inputs = tokenizer(texts, padding=True, truncation=True, return_tensors="pt")

# Run inference (no gradients needed)
with torch.no_grad():
    outputs = model(**inputs)
    predictions = torch.argmax(outputs.logits, dim=1)

print("Predicted classes:", predictions.tolist())

Note

Inference errors can occur if there are mismatches between the library or model versions used during training, export, and deployment. Always ensure your deployment environment matches your training environment as closely as possible.

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Section 4. Chapter 3