diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 2437b41932..bf0d036177 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "3.4.0"
+  ".": "3.5.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a168ca5756..c5ff44a138 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [3.5.0](https://github.com/openai/openai-python/compare/v3.4.0...v3.5.0) (2026-08-27)
+
+
+### Features
+
+* **api:** make function call output call IDs optional ([#3738](https://github.com/openai/openai-python/issues/3738)) ([c74501d](https://github.com/openai/openai-python/commit/c74501d7dc6946633fead7883ad02d8a188cf605))
+
 ## [3.4.0](https://github.com/openai/openai-python/compare/v3.3.1...v3.4.0) (2026-08-25)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 536e93b045..bf804359d6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "openai"
-version = "3.4.0"
+version = "3.5.0"
 description = "The official Python library for the openai API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/openai/_version.py b/src/openai/_version.py
index a5b76a15db..5f5fbb0639 100644
--- a/src/openai/_version.py
+++ b/src/openai/_version.py
@@ -1,2 +1,2 @@
 __title__ = "openai"
-__version__ = "3.4.0"  # x-release-please-version
+__version__ = "3.5.0"  # x-release-please-version
diff --git a/uv.lock b/uv.lock
index faf054235b..c508f413ab 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1296,7 +1296,7 @@ wheels = [
 
 [[package]]
 name = "openai"
-version = "3.4.0" # x-release-please-version
+version = "3.5.0" # x-release-please-version
 source = { editable = "." }
 dependencies = [
     { name = "anyio" },