release: 4.29.1

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "4.29.0"
+  ".": "4.29.1"
 }

CHANGELOG.md

@@ -1,5 +1,14 @@
 # Changelog
 
+## 4.29.1 (2026-03-18)
+
+Full Changelog: [v4.29.0...v4.29.1](https://github.com/openai/openai-java/compare/v4.29.0...v4.29.1)
+
+### Bug Fixes
+
+* **client:** allow updating header/query affecting fields in `toBuilder()` ([fd3b67c](https://github.com/openai/openai-java/commit/fd3b67cef9c4457506a76b9e994210e512e0181f))
+* **client:** remove redundant apiKey override ([8383a7d](https://github.com/openai/openai-java/commit/8383a7de659aa6f17e1707614f5a246ced127532))
+
 ## 4.29.0 (2026-03-17)
 
 Full Changelog: [v4.28.0...v4.29.0](https://github.com/openai/openai-java/compare/v4.28.0...v4.29.0)

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/4.29.0)
-[![javadoc](https://javadoc.io/badge2/com.openai/openai-java/4.29.0/javadoc.svg)](https://javadoc.io/doc/com.openai/openai-java/4.29.0)
+[![Maven Central](https://img.shields.io/maven-central/v/com.openai/openai-java)](https://central.sonatype.com/artifact/com.openai/openai-java/4.29.1)
+[![javadoc](https://javadoc.io/badge2/com.openai/openai-java/4.29.1/javadoc.svg)](https://javadoc.io/doc/com.openai/openai-java/4.29.1)
 
 <!-- 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/4.29.0).
+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/4.29.1).
 
 <!-- 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:4.29.0")
+implementation("com.openai:openai-java:4.29.1")
 ```
 
 ### Maven
@@ -33,7 +33,7 @@ implementation("com.openai:openai-java:4.29.0")
 <dependency>
   <groupId>com.openai</groupId>
   <artifactId>openai-java</artifactId>
-  <version>4.29.0</version>
+  <version>4.29.1</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:4.29.0")
+implementation("com.openai:openai-java-spring-boot-starter:4.29.1")
 ```
 
 #### Maven
@@ -1351,7 +1351,7 @@ implementation("com.openai:openai-java-spring-boot-starter:4.29.0")
 <dependency>
   <groupId>com.openai</groupId>
   <artifactId>openai-java-spring-boot-starter</artifactId>
-  <version>4.29.0</version>
+  <version>4.29.1</version>
 </dependency>
 ```
 

build.gradle.kts

@@ -8,7 +8,7 @@ repositories {
 
 allprojects {
     group = "com.openai"
-    version = "4.29.0" // x-release-please-version
+    version = "4.29.1" // x-release-please-version
 }
 
 subprojects {

openai-java-core/src/main/kotlin/com/openai/core/ClientOptions.kt

@@ -533,9 +533,7 @@ private constructor(
             headers.put("X-Stainless-Runtime", "JRE")
             headers.put("X-Stainless-Runtime-Version", getJavaVersion())
             headers.put("X-Stainless-Kotlin-Version", KotlinVersion.CURRENT.toString())
-            organization?.let { headers.put("OpenAI-Organization", it) }
-            project?.let { headers.put("OpenAI-Project", it) }
-
+            // We replace after all the default headers to allow end-users to overwrite them.
             headers.replaceAll(this.headers.build())
             when (credential) {
                 is AzureApiKeyCredential -> {
@@ -568,6 +566,8 @@ private constructor(
             }
 
             queryParams.replaceAll(this.queryParams.build())
+            organization?.let { headers.replace("OpenAI-Organization", it) }
+            project?.let { headers.replace("OpenAI-Project", it) }
 
             return ClientOptions(
                 httpClient,

openai-java-core/src/test/kotlin/com/openai/core/ClientOptionsTest.kt

@@ -16,6 +16,44 @@ internal class ClientOptionsTest {
 
     private val httpClient = mock<HttpClient>()
 
+    @Test
+    fun putHeader_canOverwriteDefaultHeader() {
+        val clientOptions =
+            ClientOptions.builder()
+                .httpClient(httpClient)
+                .putHeader("User-Agent", "My User Agent")
+                .apiKey("My API Key")
+                .build()
+
+        assertThat(clientOptions.headers.values("User-Agent")).containsExactly("My User Agent")
+    }
+
+    @Test
+    fun toBuilder_organizationCanBeUpdated() {
+        var clientOptions =
+            ClientOptions.builder()
+                .httpClient(httpClient)
+                .organization("My Organization")
+                .apiKey("My API Key")
+                .build()
+
+        clientOptions = clientOptions.toBuilder().organization("another My Organization").build()
+
+        assertThat(clientOptions.headers.values("OpenAI-Organization"))
+            .containsExactly("another My Organization")
+    }
+
+    @Test
+    fun toBuilder_bearerAuthCanBeUpdated() {
+        var clientOptions =
+            ClientOptions.builder().httpClient(httpClient).apiKey("My API Key").build()
+
+        clientOptions = clientOptions.toBuilder().apiKey("another My API Key").build()
+
+        assertThat(clientOptions.headers.values("Authorization"))
+            .containsExactly("Bearer another My API Key")
+    }
+
     @Test
     fun toBuilder_whenOriginalClientOptionsGarbageCollected_doesNotCloseOriginalClient() {
         var clientOptions =