diff --git a/libs/core/langchain_core/utils/function_calling.py b/libs/core/langchain_core/utils/function_calling.py
index 4775a06c5c5..acc50e7acdd 100644
--- a/libs/core/langchain_core/utils/function_calling.py
+++ b/libs/core/langchain_core/utils/function_calling.py
@@ -515,6 +515,7 @@ _WellKnownOpenAITools = (
     "mcp",
     "image_generation",
     "web_search_preview",
+    "web_search",
 )
 
 
diff --git a/libs/partners/openai/langchain_openai/chat_models/base.py b/libs/partners/openai/langchain_openai/chat_models/base.py
index afdcf47445b..7965e45d922 100644
--- a/libs/partners/openai/langchain_openai/chat_models/base.py
+++ b/libs/partners/openai/langchain_openai/chat_models/base.py
@@ -123,6 +123,7 @@ global_ssl_context = ssl.create_default_context(cafile=certifi.where())
 WellKnownTools = (
     "file_search",
     "web_search_preview",
+    "web_search",
     "computer_use_preview",
     "code_interpreter",
     "mcp",
@@ -2374,7 +2375,7 @@ class ChatOpenAI(BaseChatOpenAI):  # type: ignore[override]
 
             llm = ChatOpenAI(model="gpt-4.1-mini", output_version="responses/v1")
 
-            tool = {"type": "web_search_preview"}
+            tool = {"type": "web_search"}
             llm_with_tools = llm.bind_tools([tool])
 
             response = llm_with_tools.invoke(
diff --git a/libs/partners/openai/pyproject.toml b/libs/partners/openai/pyproject.toml
index 7707dd1c4c6..226a2e73137 100644
--- a/libs/partners/openai/pyproject.toml
+++ b/libs/partners/openai/pyproject.toml
@@ -8,7 +8,7 @@ license = { text = "MIT" }
 requires-python = ">=3.9"
 dependencies = [
     "langchain-core<1.0.0,>=0.3.74",
-    "openai<2.0.0,>=1.99.9",
+    "openai<2.0.0,>=1.104.2",
     "tiktoken<1,>=0.7",
 ]
 name = "langchain-openai"
diff --git a/libs/partners/openai/uv.lock b/libs/partners/openai/uv.lock
index 9b39b22ea2d..027bda7fb49 100644
--- a/libs/partners/openai/uv.lock
+++ b/libs/partners/openai/uv.lock
@@ -1,5 +1,5 @@
 version = 1
-revision = 3
+revision = 2
 requires-python = ">=3.9"
 resolution-markers = [
     "python_full_version >= '3.13' and platform_python_implementation == 'PyPy'",
@@ -588,7 +588,7 @@ typing = [
 [package.metadata]
 requires-dist = [
     { name = "langchain-core", editable = "../../core" },
-    { name = "openai", specifier = ">=1.99.9,<2.0.0" },
+    { name = "openai", specifier = ">=1.104.2,<2.0.0" },
     { name = "tiktoken", specifier = ">=0.7,<1" },
 ]
 
@@ -1001,7 +1001,7 @@ wheels = [
 
 [[package]]
 name = "openai"
-version = "1.101.0"
+version = "1.104.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
@@ -1013,9 +1013,9 @@ dependencies = [
     { name = "tqdm" },
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/00/7c/eaf06b62281f5ca4f774c4cff066e6ddfd6a027e0ac791be16acec3a95e3/openai-1.101.0.tar.gz", hash = "sha256:29f56df2236069686e64aca0e13c24a4ec310545afb25ef7da2ab1a18523f22d", size = 518415, upload-time = "2025-08-21T21:11:01.645Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/94/dc/965b3528ed0435b717acca45e2541d94bd827c0520ce172366323c9edcab/openai-1.104.2.tar.gz", hash = "sha256:9b582ead9dd208753f89dae8e36b6548c6ada076e87ba3db36630e29239661ab", size = 557160, upload-time = "2025-09-02T21:42:31.054Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c8/a6/0e39baa335bbd1c66c7e0a41dbbec10c5a15ab95c1344e7f7beb28eee65a/openai-1.101.0-py3-none-any.whl", hash = "sha256:6539a446cce154f8d9fb42757acdfd3ed9357ab0d34fcac11096c461da87133b", size = 810772, upload-time = "2025-08-21T21:10:59.215Z" },
+    { url = "https://files.pythonhosted.org/packages/46/9c/d0b56971e5584aea338bb00d3ca96a7f6694dff77006581b21cd773497ce/openai-1.104.2-py3-none-any.whl", hash = "sha256:0148951da12ea651f890ef38f8adef75b78c053dba37ea2bdba857c8945860d4", size = 928160, upload-time = "2025-09-02T21:42:28.678Z" },
 ]
 
 [[package]]