OpenAI

The OpenAI plugin provides access to OpenAI’s models including GPT-4o, DALL-E, and text embeddings.

Installation

<dependency>
    <groupId>com.google.genkit</groupId>
    <artifactId>genkit-plugin-openai</artifactId>
    <version>1.0.0-SNAPSHOT</version>
</dependency>

Configuration

export OPENAI_API_KEY=your-api-key

Usage

import com.google.genkit.plugins.openai.OpenAIPlugin;

Genkit genkit = Genkit.builder()
    .plugin(OpenAIPlugin.create())
    .build();

ModelResponse response = genkit.generate(
    GenerateOptions.builder()
        .model("openai/gpt-4o-mini")
        .prompt("Tell me about AI")
        .build());

Available models

• openai/gpt-5.5 — Most capable flagship (also gpt-5.5-pro)
• openai/gpt-5.4 — High-performance general model (also -mini, -nano, -pro)
• openai/gpt-5 — GPT-5 base (also gpt-5-mini, gpt-5-nano, gpt-5-pro)
• openai/gpt-4.1 — Smartest non-reasoning model (also gpt-4.1-mini)
• openai/gpt-4o — Multimodal model
• openai/gpt-4o-mini — Fast and cost-effective
• openai/o3 — Reasoning model (also o3-pro)

Embeddings

EmbedResponse response = genkit.embed(
    "openai/text-embedding-3-small", documents
);

Features

• Text generation and streaming
• Vision (image understanding)
• Tool calling
• Embeddings (text-embedding-3-small, text-embedding-3-large)
• Image generation (DALL-E 3/2)
• RAG support

Sample

See the openai sample.