openai4j and openai-java

These are competing Java client libraries for the OpenAI API, offering similar functionalities to interact with OpenAI models.

openai4j
47
Emerging
openai-java
39
Emerging
Maintenance 2/25
Adoption 10/25
Maturity 16/25
Community 19/25
Maintenance 0/25
Adoption 8/25
Maturity 16/25
Community 15/25
Stars: 403
Forks: 54
Downloads: —
Commits (30d): 0
Language: Java
License: MIT
Stars: 59
Forks: 9
Downloads: —
Commits (30d): 0
Language: Java
License: MIT
Stale 6m No Package No Dependents
Stale 6m No Package No Dependents

About openai4j

Lambdua/openai4j

Java client library for OpenAI API.Full support for all OpenAI API models including Completions, Chat, Edits, Embeddings, Audio, Files, Assistants-v2, Images, Moderations, Batch, and Fine-tuning.

Built on Retrofit and OkHttpClient, the library offers both synchronous and asynchronous streaming APIs, with vision capabilities for image analysis and tool/function calling support. It's structured as modular Maven artifacts—separating POJOs (api module) from service implementations—allowing developers to either use the full OpenAiService or build custom clients with standardized domain objects. The client handles environment variable configuration, connection pooling, and customizable interceptors for retry logic and load balancing.

About openai-java

forestwanglin/openai-java

OpenAi GPT API for Java. Including all API from OpenAI except deprecated. It especially includes stream client and jtokkit with function calculation. Including Baidu AI.

Related comparisons

openai4j and openai-java-sdk openai4j and jvm-openai openai4j and Easy-open-ai openai4j and openai-for-java openai4j and assistant-api-java openai4j and OpenAI_SDK

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