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Hugging Face

In order to use Hugging Face Inference Providers, you need to import the langchain4j-open-ai module, as Hugging Face Inference Providers API is OpenAI-compatible.

Maven Dependency​

<dependency>
    <groupId>dev.langchain4j</groupId>
    <artifactId>langchain4j-open-ai</artifactId>
    <version>1.8.0</version>
</dependency>

Examples​

ChatModel model = OpenAiChatModel.builder()
    .apiKey(System.getenv("HF_API_KEY"))
    .baseUrl("https://router.huggingface.co/v1")
    .modelName("HuggingFaceTB/SmolLM3-3B:hf-inference")
    .build();

StreamingChatModel streamingModel = OpenAiStreamingChatModel.builder()
    .apiKey(System.getenv("HF_API_KEY"))
    .baseUrl("https://router.huggingface.co/v1")
    .modelName("HuggingFaceTB/SmolLM3-3B:hf-inference")
    .build();