release: 4.0.0

Author: stainless-app[bot]

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "3.7.1"
+  ".": "4.0.0"
 }

CHANGELOG.md

@@ -1,5 +1,22 @@
 # Changelog
 
+## 4.0.0 (2025-09-30)
+
+Full Changelog: [v3.7.1...v4.0.0](https://github.com/openai/openai-java/compare/v3.7.1...v4.0.0)
+
+### ⚠ BREAKING CHANGES
+
+* **api:** `ResponseFunctionToolCallOutputItem.output` and `ResponseCustomToolCallOutput.output` now return `string | Array<ResponseInputText | ResponseInputImage | ResponseInputFile>` instead of `string` only. This may break existing callsites that assume `output` is always a string.
+
+### Features
+
+* **api:** Support images and files for function call outputs in responses, BatchUsage ([de7a6c1](https://github.com/openai/openai-java/commit/de7a6c18862af4f94ce7bbc3a3ae447520be5880))
+
+
+### Bug Fixes
+
+* **client:** remove duplicate outputAsJson function ([4718871](https://github.com/openai/openai-java/commit/4718871e7e281b0a75c914d013e3b644340d5c4b))
+
 ## 3.7.1 (2025-09-26)
 
 Full Changelog: [v3.7.0...v3.7.1](https://github.com/openai/openai-java/compare/v3.7.0...v3.7.1)

README.md

@@ -2,16 +2,16 @@
 
 <!-- x-release-please-start-version -->
 
-[![Maven Central](https://img.shields.io/maven-central/v/com.openai/openai-java)](https://central.sonatype.com/artifact/com.openai/openai-java/3.7.1)
-[![javadoc](https://javadoc.io/badge2/com.openai/openai-java/3.7.1/javadoc.svg)](https://javadoc.io/doc/com.openai/openai-java/3.7.1)
+[![Maven Central](https://img.shields.io/maven-central/v/com.openai/openai-java)](https://central.sonatype.com/artifact/com.openai/openai-java/4.0.0)
+[![javadoc](https://javadoc.io/badge2/com.openai/openai-java/4.0.0/javadoc.svg)](https://javadoc.io/doc/com.openai/openai-java/4.0.0)
 
 <!-- x-release-please-end -->
 
 The OpenAI Java SDK provides convenient access to the [OpenAI REST API](https://platform.openai.com/docs) from applications written in Java.
 
 <!-- x-release-please-start-version -->
 
-The REST API documentation can be found on [platform.openai.com](https://platform.openai.com/docs). Javadocs are available on [javadoc.io](https://javadoc.io/doc/com.openai/openai-java/3.7.1).
+The REST API documentation can be found on [platform.openai.com](https://platform.openai.com/docs). Javadocs are available on [javadoc.io](https://javadoc.io/doc/com.openai/openai-java/4.0.0).
 
 <!-- x-release-please-end -->
 
@@ -24,7 +24,7 @@ The REST API documentation can be found on [platform.openai.com](https://platfor
 ### Gradle
 
 ```kotlin
-implementation("com.openai:openai-java:3.7.1")
+implementation("com.openai:openai-java:4.0.0")
 ```
 
 ### Maven
@@ -33,7 +33,7 @@ implementation("com.openai:openai-java:3.7.1")
 <dependency>
   <groupId>com.openai</groupId>
   <artifactId>openai-java</artifactId>
-  <version>3.7.1</version>
+  <version>4.0.0</version>
 </dependency>
 ```
 
@@ -1342,7 +1342,7 @@ If you're using Spring Boot, then you can use the SDK's [Spring Boot starter](ht
 #### Gradle
 
 ```kotlin
-implementation("com.openai:openai-java-spring-boot-starter:3.7.1")
+implementation("com.openai:openai-java-spring-boot-starter:4.0.0")
 ```
 
 #### Maven
@@ -1351,7 +1351,7 @@ implementation("com.openai:openai-java-spring-boot-starter:3.7.1")
 <dependency>
   <groupId>com.openai</groupId>
   <artifactId>openai-java-spring-boot-starter</artifactId>
-  <version>3.7.1</version>
+  <version>4.0.0</version>
 </dependency>
 ```
 

build.gradle.kts

@@ -8,7 +8,7 @@ repositories {
 
 allprojects {
     group = "com.openai"
-    version = "3.7.1" // x-release-please-version
+    version = "4.0.0" // x-release-please-version
 }
 
 subprojects {