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ChatGPT-Java is a Java SDK created by PlexPt that offers a convenient, out-of-the-box integration with the OpenAI ChatGPT API (including models like GPT-4o, GPT-5) for Java applications. The library supports chat completions, token counting, function calls, streaming responses, proxy configuration, custom API host, and integration with frameworks such as Spring (via SseEmitter). It abstracts the HTTP interaction and JSON parsing into simple Java objects and builders while handling details like token usage and model selection. It is published to Maven Central under the group com.github.plexpt, e.g., version 5.0.1. The SDK is designed for developers building chatbots, conversational assistants, and integrations in Java or Spring ecosystems. Being open source under MIT, it provides transparency and community contributions.
Features
- Builder API to configure ChatGPT client with API key, proxy, timeout, custom host
- Support for chat completions using GPT-4o/GPT-5 models, with token usage tracking
- Function call support allowing definition of custom functions and parameter schemas
- Streaming response support (especially for reactive frameworks, SSE)
- Token counting utilities to measure prompt and completion cost
- Maven Central published SDK with MIT license
Project Samples
