Spring AI 1.0 Released, Streamlines AI App Development with Broad Model Support

The Spring team has announced the general availability of Spring AI 1.0, a framework designed to simplify the development of AI-driven applications within the Java and Spring ecosystem. This release, the result of over two years of development and eight milestone iterations, delivers a stable API. It integrates with a wide range of AI models for chat, image generation, and transcription. Key features include portable service abstractions, support for Retrieval Augmented Generation (RAG) via vector databases, and tools for function calling. Spring AI 1.0 enables developers to build scalable, production-ready AI applications by aligning with established Spring patterns and the broader Spring ecosystem.

Spring AI provides out-of-the-box support for numerous AI models and providers. The framework integrates with major generative AI providers, including OpenAI, Anthropic, Microsoft Azure OpenAI, Amazon Bedrock, and Google Vertex AI, through a unified API layer. It supports various model types across modalities, including chat completion, embedding, image generation, audio transcription, text-to-speech synthesis, and content moderation. This enables developers to integrate capabilities such as GPT-based chatbots, image creation, or speech recognition into Spring applications.

The framework offers portable service abstractions, decoupling application code from specific AI providers. Its API facilitates switching between model providers (e.g., from OpenAI to Anthropic) with minimal code changes, while retaining access to model-specific features. Spring AI supports structured outputs by mapping AI model responses to Plain Old Java Objects (POJOs) for type-safe processing. For Retrieval Augmented Generation (RAG), Spring AI integrates with various vector databases, including Cassandra, PostgreSQL/PGVector, MongoDB Atlas, Milvus, Pinecone, and Redis, through a consistent Vector Store API, enabling applications to ground LLM responses in enterprise data. The framework also includes support for tools and function calling APIs, allowing AI models to invoke functions or external tools in a standardized manner to address use cases like "Q&A over your documentation" or "chat with your data."

Spring AI 1.0 includes support for the Model Context Protocol (MCP), an emerging open standard for structured, language-agnostic interaction between AI models (particularly LLMs) and external tools or resources. The Spring team has contributed its MCP implementation to ModelContextProtocol.io, where it serves as an official Java SDK for MCP services. This reflects Spring AI's focus on open standards and interoperability.

To facilitate MCP integration, Spring AI provides dedicated client and server Spring Boot starters, enabling models to interact with tools like this example weather service:

import org.springframework.ai.tool.annotation.Tool; import org.springframework.stereotype.Component; @Component public class WeatherTool { @Tool(name = "getWeather", description = "Returns weather for a given city") public String getWeather(String city) { return "The weather in " + city + " is 21°C and sunny."; } }

These starters are categorized as follows:

• Client Starters: spring-ai-starter-mcp-client (providing core STDIO and HTTP-based SSE support) and spring-ai-starter-mcp-client-webflux (offering WebFlux-based SSE transport for reactive applications).
• Server Starters: spring-ai-starter-mcp-server (for core STDIO transport support), spring-ai-starter-mcp-server-webmvc (for Spring MVC-based SSE transport in servlet applications), and spring-ai-starter-mcp-server-webflux (for WebFlux-based SSE transport in reactive applications).

Developers can begin new Spring AI 1.0 projects using Spring Initializr, which preconfigures necessary dependencies. Including the desired Spring AI starter on the classpath allows Spring Boot to auto-configure the required clients or services.

An example of a simple chat controller is as follows:

import org.springframework.ai.chat.client.ChatClient; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; @RestController public class ChatController { private final ChatClient chatClient; public ChatController(ChatClient.Builder chatClientBuilder) { this.chatClient = chatClientBuilder.build(); } @GetMapping("/ask") public String ask(@RequestParam String question) { return chatClient.prompt() .user(question) .call() .content(); } }

At a minimum, the following key-value in application.properties is necessary to run the above example.

spring.ai.openai.api-key=YOUR_API_KEY spring.ai.openai.chat.model=gpt-4

Spring AI introduces higher-level APIs for common AI application patterns. A fluent ChatClient API offers a type-safe builder for chat model interactions. Additionally, an Advisors API encapsulates recurring generative AI patterns such as retrieval augmentation, conversational memory, and question-answering workflows. For instance, a RAG flow can be implemented by combining ChatClient with QuestionAnswerAdvisor:

ChatResponse response = ChatClient.builder(chatModel) .build() .prompt() .advisors(new QuestionAnswerAdvisor(vectorStore)) .user(userText) .call() .chatResponse();

In this example, QuestionAnswerAdvisor performs a similarity search in the VectorStore, appends relevant context to the user prompt, and forwards the enriched input to the model. An optional SearchRequest with an SQL-like filter can constrain document searches.

The release incorporates Micrometer for observability, allowing developers to monitor AI-driven applications. These integrations facilitate embedding AI capabilities into Spring-based projects for various applications, including real-time chat, image processing, and transcription services.

For more information, developers can explore the Spring AI project page or begin building with Spring AI at start.spring.io. This release provides Java developers with a solution for integrating AI capabilities, offering features for scalability and alignment with idiomatic Spring development.