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GitHub Models

If you want to develop a generative AI application, you can use GitHub Models to find and experiment with AI models for free. Once you are ready to bring your application to production, you can switch to a token from a paid Azure account.

GitHub Models Documentation​

Maven Dependency​

Plain Java​

<dependency>
    <groupId>dev.langchain4j</groupId>
    <artifactId>langchain4j-github-models</artifactId>
    <version>0.35.0</version>
</dependency>

GitHub token​

To use GitHub Models, you need to use a GitHub token for authentication.

Token are created and managed in GitHub Developer Settings > Personal access tokens.

Once you have a token, you can set it as an environment variable and use it in your code:

export GITHUB_TOKEN="<your-github-token-goes-here>"

Creating a GitHubModelsChatModel with a GitHub token​

Plain Java​

GitHubModelsChatModel model = GitHubModelsChatModel.builder()
        .gitHubToken(System.getenv("GITHUB_TOKEN"))
        .modelName("gpt-4o-mini")
        .build();

This will create an instance of GitHubModelsChatModel. Model parameters (e.g. temperature) can be customized by providing values in the GitHubModelsChatModel's builder.

Spring Boot​

Create a GitHubModelsChatModelConfiguration Spring Bean:

package com.example.demo.configuration.github;

import dev.langchain4j.model.chat.ChatLanguageModel;
import dev.langchain4j.model.github.GitHubModelsChatModel;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;

@Configuration
@Profile("github")
public class GitHubModelsChatModelConfiguration {

    @Value("${GITHUB_TOKEN}")
    private String gitHubToken;

    @Bean
    ChatLanguageModel gitHubModelsChatLanguageModel() {
        return GitHubModelsChatModel.builder()
                .gitHubToken(gitHubToken)
                .modelName("gpt-4o-mini")
                .logRequestsAndResponses(true)
                .build();
    }
}

This configuration will create an GitHubModelsChatModel bean, which can be either used by an AI Service or autowired where needed, for example:

@RestController
class ChatLanguageModelController {

    ChatLanguageModel chatLanguageModel;

    ChatLanguageModelController(ChatLanguageModel chatLanguageModel) {
        this.chatLanguageModel = chatLanguageModel;
    }

    @GetMapping("/model")
    public String model(@RequestParam(value = "message", defaultValue = "Hello") String message) {
        return chatLanguageModel.generate(message);
    }
}

Creating a GitHubModelsStreamingChatModel with a GitHub token​

Plain Java​

GitHubModelsStreamingChatModel model = GitHubModelsStreamingChatModel.builder()
        .gitHubToken(System.getenv("GITHUB_TOKEN"))
        .modelName("gpt-4o-mini")
        .logRequestsAndResponses(true)
        .build();

Spring Boot​

Create a GitHubModelsStreamingChatModelConfiguration Spring Bean:

package com.example.demo.configuration.github;

import dev.langchain4j.model.chat.ChatLanguageModel;
import dev.langchain4j.model.github.GitHubModelsChatModel;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;

@Configuration
@Profile("github")
public class GitHubModelsStreamingChatModelConfiguration {

    @Value("${GITHUB_TOKEN}")
    private String gitHubToken;

    @Bean
    GitHubModelsStreamingChatModel gitHubModelsStreamingChatLanguageModel() {
        return GitHubModelsStreamingChatModel.builder()
                .gitHubToken(System.getenv("GITHUB_TOKEN"))
                .modelName("gpt-4o-mini")
                .logRequestsAndResponses(true)
                .build();
    }
}

Examples​