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ADDING_NEW_MODEL.md

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Adding a New Model

OpenLLM encourages contributions by welcoming users to incorporate their custom Large Language Models (LLMs) into the ecosystem. You can set up your development environment by referring to our Developer Guide.

Procedure

All the relevant code for incorporating a new model resides within src/openllm/models. Start by creating a new folder named after your model_name in snake_case. Here's your roadmap:

  • Generate model configuration file: src/openllm/models/{model_name}/configuration_{model_name}.py
  • Establish model implementation files: src/openllm/models/{model_name}/modeling_{runtime}_{model_name}.py
  • Create module's __init__.py: src/openllm/models/{model_name}/__init__.py
  • Adjust the entrypoints for files at src/openllm/models/auto/*
  • Modify the main __init__.py: src/openllm/models/__init__.py
  • Develop or adjust dummy objects for dependencies, a task exclusive to the utils directory: src/openllm/utils/*

For a working example, check out any pre-implemented model.

We are developing a CLI command and helper script to generate these files, which would further streamline the process. Until then, manual creation is necessary.

Model Configuration

File Name: configuration_{model_name}.py

This file is dedicated to specifying docstrings, default prompt templates, default parameters, as well as additional fields for the models.

Model Implementation

File Name: modeling_{runtime}_{model_name}.py

For each runtime, i.e., torch (default with no prefix), TensorFlow -tf, Flax - flax, it is necessary to implement a class that adheres to the openllm.LLM interface. The conventional class name follows the RuntimeModelName pattern, e.g., FlaxFlanT5.

Initialization Files

The __init__.py files facilitate intelligent imports, type checking, and auto-completions for the OpenLLM codebase and CLIs.

Entrypoint

After establishing the model config and implementation class, register them in the auto folder files. There are four entrypoint files:

  • configuration_auto.py: Registers ModelConfig classes
  • modeling_auto.py: Registers a model's PyTorch implementation
  • modeling_tf_auto.py: Registers a model's TensorFlow implementation
  • modeling_flax_auto.py: Registers a model's Flax implementation

Dummy Objects

In the src/openllm/utils directory, dummy objects are created for each model and runtime implementation. These specify the dependencies required for each model.

Updating README.md

Run ./tools/update-readme.py to update the README.md file with the new model.

Raise a Pull Request

Once you have completed the checklist above, raise a PR and the OpenLLMs maintainer will review it ASAP. Once the PR is merged, you should be able to see your model in the next release! 🎉 🎊