In recent years, large language models have changed how developers make apps. These models use advanced AI to understand and generate human language. For mobile developers, adding these models to apps can bring new features like chatbots, voice assistants, and smart text prediction. The best part is many of these powerful models are open-source, which means they are free to use and modify. Here’s a guide to the best open-source large language models for mobile developers.

1. GPT-3 by OpenAI

Overview:

GPT-3 is one of the most powerful language models ever built. It essentially outputs something that can't be easily discerned as output from a machine. However, the fully released version was closed-source; on the other hand, a small version was shared with OpenAI to distribute for developers, called the GPT-3 DaVinci. 

Key Features:

Text Generation: So chatbots and virtual assistants produce natural-sounding text

Text Completion: It is also an extra capability of GPT-3 of continuing sentences or paragraphs that may be incomplete.

Translation: Given a text in one language, translate it into another.

How to Use:

You can use GPT-3 through the API provided by OpenAI. You will have to sign in to acquire an API key but having this, GPT-3 is pretty easy to implement within your mobile apps.

2. BERT by Google

Overview:

Another very strong language model developed by Google is BERT, or Bidirectional Encoder Representations from Transformers. It goes one step further in being able to grasp the context of words in a sentence. This makes it particularly apt for answering questions and classifying texts, amongst other NLP tasks.

Key Features:

Contextual Understanding: Understanding the meaning of words due to the context in which they are used

Text Classification: This allows for the grouping of texts; spam or not spam, for example.

Question Answering: Identify answers to questions that have been elicitated from a text.

How to Use:

BERT is an open-source project, and freely available on GitHub. Download the model and then develop mobile apps by using development libraries like for all TensorFlow or PyTorch such kind of uses.

3. T5 by Google

Overview:

Other variants of models from Google include T5, the Text-to-Text Transfer Transformer, which treats every NLP problem as a text-to-text problem, thus being able to process a wide variety of tasks by representing the inputs as text and processing them.

Key Features:

Flexibility: T5 can deal with a vast number of task types, from translation to summarization.

Text Summarisation: It has the ability to generate a few short sentences that summarize several pages of text.

Text Generation: Generate text output given an input.

Use :

T5 is also available on Github as an open-source model. You can integrate it to your mobile apps using Tensorflow or PyTorch frameworks.

4. ALBERT by Google

Overview:

ALBERT is a light version of BERT but seems comparatively fast. It is lighter in size and, therefore, more efficient than the actual BERT, while retaining most of the performance of the actual BERT model.

Significant Features:

Efficiency: Fewer resources used make it more suitable for mobile.

Text Classification: This allows quick and easy text classification.

Question Answering: Answers need to be fetched from text.

Usage

ALBERT is open-sourced on GitHub. It could be integrated into mobile apps either through TensorFlow or PyTorch.

5. RoBERTa

RoBERTa is a Facebook development over BERT. The latter is improved upon while its predecessor forms the foundation. The new RoBERTa has far been trained on more data and for longer hours, making it far more powerful than the earlier version.

Key Features

Improved Performance: More accurate performance compared to the original BERT model

Text Classification: Classifies text to know what it says and places it in the relevant category

Question Answering: Answers brief questions

How to Use?

The model is also open source and available on GitHub. Developers can use it for their Mobile applications using either TensorFlow or PyTorch.

6. DistilBERT from Hugging Face

Overview:

DistilBERT is a smaller, faster, and cheaper BERT, which the Hugging Face developed. He has retained most of the accuracy in BERT, but he is more efficient.

Key Features:

Small size: Smaller model size that fits mobile devices.

Speed: Faster processing speed promotion of real-time applications.

Text Classification: Categorizes text efficiently.

Usage:

DistilBERT is open-source and hosted on Hugging Face's GitHub. It's easy to use from your mobile apps via the Transformers library, also from Hugging Face.