diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index e66e9ab9f4..529006a8d5 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.108.2"
+  ".": "1.109.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 062111e2c4..48863a6e93 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 118
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-937fcfac8cbab692796cd9822b37e48a311e2220a8b103106ded0ee92a0b9484.yml
-openapi_spec_hash: 74a0c58b5b8c4e06792d79b685e02a01
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai%2Fopenai-410219ea680089f02bb55163c673919703f946c3d6ad7ff5d6f607121d5287d5.yml
+openapi_spec_hash: 2b3eee95d3f6796c7a61dfddf694a59a
 config_hash: 666d6bb4b564f0d9d431124b5d1a0665
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 34d2e24899..15e8f62701 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.109.0 (2025-09-23)
+
+Full Changelog: [v1.108.2...v1.109.0](https://github.com/openai/openai-python/compare/v1.108.2...v1.109.0)
+
+### Features
+
+* **api:** gpt-5-codex ([34502b5](https://github.com/openai/openai-python/commit/34502b5a175f8a10ea8694fcea38fe7308de89ef))
+
 ## 1.108.2 (2025-09-22)
 
 Full Changelog: [v1.108.1...v1.108.2](https://github.com/openai/openai-python/compare/v1.108.1...v1.108.2)
diff --git a/pyproject.toml b/pyproject.toml
index 01d7c4e4a2..26dfbcf443 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "openai"
-version = "1.108.2"
+version = "1.109.0"
 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 a266f4ecdb..16f48fb404 100644
--- a/src/openai/_version.py
+++ b/src/openai/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "openai"
-__version__ = "1.108.2"  # x-release-please-version
+__version__ = "1.109.0"  # x-release-please-version
diff --git a/src/openai/types/shared/all_models.py b/src/openai/types/shared/all_models.py
index 828f3b5669..76ca1ffd29 100644
--- a/src/openai/types/shared/all_models.py
+++ b/src/openai/types/shared/all_models.py
@@ -21,5 +21,6 @@
         "o4-mini-deep-research-2025-06-26",
         "computer-use-preview",
         "computer-use-preview-2025-03-11",
+        "gpt-5-codex",
     ],
 ]
diff --git a/src/openai/types/shared/responses_model.py b/src/openai/types/shared/responses_model.py
index 4d35356806..4fbdce8db9 100644
--- a/src/openai/types/shared/responses_model.py
+++ b/src/openai/types/shared/responses_model.py
@@ -21,5 +21,6 @@
         "o4-mini-deep-research-2025-06-26",
         "computer-use-preview",
         "computer-use-preview-2025-03-11",
+        "gpt-5-codex",
     ],
 ]
diff --git a/src/openai/types/shared_params/responses_model.py b/src/openai/types/shared_params/responses_model.py
index adfcecf1e5..2feaa22b67 100644
--- a/src/openai/types/shared_params/responses_model.py
+++ b/src/openai/types/shared_params/responses_model.py
@@ -23,5 +23,6 @@
         "o4-mini-deep-research-2025-06-26",
         "computer-use-preview",
         "computer-use-preview-2025-03-11",
+        "gpt-5-codex",
     ],
 ]