diff --git a/pkgs/development/python-modules/langchain-core/default.nix b/pkgs/development/python-modules/langchain-core/default.nix
index 816bffad7642..28e3ab3dcb25 100644
--- a/pkgs/development/python-modules/langchain-core/default.nix
+++ b/pkgs/development/python-modules/langchain-core/default.nix
@@ -37,14 +37,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-core";
-  version = "1.2.5";
+  version = "1.2.7";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-core==${version}";
-    hash = "sha256-gHIJO5O9AxtROdDuo2UhdkW6p3+4dOJaO6iKelA26gE=";
+    hash = "sha256-X/gT+OtA9bQR0vvsfzT3881WUkbRmcY1Ahqk8kT6M9s=";
   };
 
   sourceRoot = "${src.name}/libs/core";
diff --git a/pkgs/development/python-modules/langchain-mongodb/default.nix b/pkgs/development/python-modules/langchain-mongodb/default.nix
index 88bf6a9556d5..d139b2cc9298 100644
--- a/pkgs/development/python-modules/langchain-mongodb/default.nix
+++ b/pkgs/development/python-modules/langchain-mongodb/default.nix
@@ -2,6 +2,7 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  pythonAtLeast,
 
   # build-system
   hatchling,
@@ -35,27 +36,20 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-mongodb";
-  version = "0.10.0";
+  version = "0.11.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain-mongodb";
     tag = "libs/langchain-mongodb/v${finalAttrs.version}";
-    hash = "sha256-MRvj6RJ6N+u1wA+zkyWhe4tnGaC4FduPl+k7AhBIwLI=";
+    hash = "sha256-dO0dASjyNMxnbxZ/ry8lcJxedPdrv6coYiTjOcaT8/0=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/langchain-mongodb";
 
   build-system = [ hatchling ];
 
-  pythonRelaxDeps = [
-    # Each component release requests the exact latest core.
-    # That prevents us from updating individual components.
-    "langchain-core"
-    "numpy"
-  ];
-
   dependencies = [
     langchain
     langchain-classic
@@ -91,6 +85,10 @@ buildPythonPackage (finalAttrs: {
   pytestFlags = [
     # DeprecationWarning: 'asyncio.get_event_loop_policy' is deprecated
     "-Wignore::DeprecationWarning"
+  ]
+  ++ lib.optionals (pythonAtLeast "3.14") [
+    # UserWarning: Core Pydantic V1 functionality isn't compatible with Python 3.14
+    "-Wignore::UserWarning"
   ];
 
   pythonImportsCheck = [ "langchain_mongodb" ];
diff --git a/pkgs/development/python-modules/langchain-tests/default.nix b/pkgs/development/python-modules/langchain-tests/default.nix
index 526ca96776a3..15356490fd7a 100644
--- a/pkgs/development/python-modules/langchain-tests/default.nix
+++ b/pkgs/development/python-modules/langchain-tests/default.nix
@@ -9,20 +9,18 @@
   # dependencies
   httpx,
   langchain-core,
-  syrupy,
-  pytest-benchmark,
-  pytest-codspeed,
+  numpy,
+  pytest-asyncio,
   pytest-recording,
+  pytest-socket,
+  syrupy,
   vcrpy,
 
   # buildInputs
-  pytest,
+  pytestCheckHook,
 
   # tests
-  numpy,
-  pytest-asyncio_0,
-  pytest-socket,
-  pytestCheckHook,
+  pytest-benchmark,
 
   # passthru
   gitUpdater,
@@ -44,35 +42,37 @@ buildPythonPackage rec {
 
   build-system = [ hatchling ];
 
+  pythonRemoveDeps = [
+    "pytest-benchmark"
+    "pytest-codspeed"
+  ];
+
   pythonRelaxDeps = [
-    # Each component release requests the exact latest core.
-    # That prevents us from updating individual components.
-    "langchain-core"
-    "numpy"
     "syrupy"
   ];
 
   dependencies = [
     httpx
     langchain-core
-    pytest-asyncio_0
+    numpy
+    pytest-asyncio
     pytest-benchmark
-    pytest-codspeed
     pytest-recording
     pytest-socket
     syrupy
     vcrpy
   ];
 
-  buildInputs = [ pytest ];
-
   pythonImportsCheck = [ "langchain_tests" ];
 
   nativeBuildInputs = [
-    numpy
     pytestCheckHook
   ];
 
+  disabledTestMarks = [
+    "benchmark"
+  ];
+
   passthru = {
     # python updater script sets the wrong tag
     skipBulkUpdate = true;
diff --git a/pkgs/development/python-modules/langchain/default.nix b/pkgs/development/python-modules/langchain/default.nix
index edd0a43514cf..1282a6a0c1a6 100644
--- a/pkgs/development/python-modules/langchain/default.nix
+++ b/pkgs/development/python-modules/langchain/default.nix
@@ -2,41 +2,40 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  pythonOlder,
 
   # build-system
   hatchling,
 
   # dependencies
-  aiohttp,
-  async-timeout,
   langchain-core,
-  langchain-text-splitters,
   langgraph,
-  langsmith,
-  numpy,
   pydantic,
-  pyyaml,
-  requests,
-  sqlalchemy,
-  tenacity,
+
+  # Optional dependencies
+  langchain-anthropic,
+  langchain-aws,
+  langchain-community,
+  langchain-deepseek,
+  langchain-fireworks,
+  langchain-google-genai,
+  langchain-groq,
+  langchain-huggingface,
+  langchain-mistralai,
+  langchain-ollama,
+  langchain-openai,
+  langchain-perplexity,
+  langchain-xai,
 
   # runtime
   runtimeShell,
 
   # tests
-  blockbuster,
-  freezegun,
-  httpx,
   langchain-tests,
-  lark,
-  pandas,
   pytest-asyncio,
   pytest-mock,
   pytest-socket,
+  pytest-xdist,
   pytestCheckHook,
-  requests-mock,
-  responses,
   syrupy,
   toml,
 
@@ -46,14 +45,14 @@
 
 buildPythonPackage rec {
   pname = "langchain";
-  version = "1.2.0";
+  version = "1.2.7";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain==${version}";
-    hash = "sha256-DximXCwrDSUVXZenUrubuGcxdnRCPCPMgdW9UJnkGnE=";
+    hash = "sha256-vwd8FoXeMLQyFcEViXx/3LqpNieyp4HHevMAv2AxNVY=";
   };
 
   sourceRoot = "${src.name}/libs/langchain_v1";
@@ -74,37 +73,38 @@ buildPythonPackage rec {
   ];
 
   dependencies = [
-    aiohttp
     langchain-core
-    langchain-text-splitters
     langgraph
-    langsmith
-    numpy
     pydantic
-    pyyaml
-    requests
-    sqlalchemy
-    tenacity
-  ]
-  ++ lib.optional (pythonOlder "3.11") async-timeout;
+  ];
 
   optional-dependencies = {
-    numpy = [ numpy ];
+    anthropic = [ langchain-anthropic ];
+    aws = [ langchain-aws ];
+    # azure-ai = [langchain-azure-ai];
+    community = [ langchain-community ];
+    deepseek = [ langchain-deepseek ];
+    fireworks = [ langchain-fireworks ];
+    google-genai = [ langchain-google-genai ];
+    # google-vertexai = [langchain-google-vertexai];
+    groq = [ langchain-groq ];
+    huggingface = [ langchain-huggingface ];
+    mistralai = [ langchain-mistralai ];
+    ollama = [ langchain-ollama ];
+    openai = [ langchain-openai ];
+    perplexity = [ langchain-perplexity ];
+    # together = [langchain-together];
+    xai = [ langchain-xai ];
   };
 
   nativeCheckInputs = [
-    blockbuster
-    freezegun
-    httpx
-    lark
     langchain-tests
-    pandas
+    # langchain-openai -- causes recursion error
     pytest-asyncio
     pytest-mock
     pytest-socket
+    pytest-xdist
     pytestCheckHook
-    requests-mock
-    responses
     syrupy
     toml
   ];
@@ -113,6 +113,7 @@ buildPythonPackage rec {
     "--only-core"
   ];
 
+  # Note: Not testing with optional dependencies due to mutual recursion
   enabledTestPaths = [
     # integration_tests require network access, database access and require `OPENAI_API_KEY`, etc.
     "tests/unit_tests"
diff --git a/pkgs/development/python-modules/langgraph-prebuilt/default.nix b/pkgs/development/python-modules/langgraph-prebuilt/default.nix
index 90f5a5f7bf10..5801fa151f72 100644
--- a/pkgs/development/python-modules/langgraph-prebuilt/default.nix
+++ b/pkgs/development/python-modules/langgraph-prebuilt/default.nix
@@ -31,14 +31,14 @@
 # It exists so the langgraph team can iterate on it without having to rebuild langgraph.
 buildPythonPackage rec {
   pname = "langgraph-prebuilt";
-  version = "1.0.6";
+  version = "1.0.7";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langgraph";
     tag = "prebuilt==${version}";
-    hash = "sha256-IE9Y+kFkDN49SuwvTNwa2kK+Hig18sJPZmZCqHUP3DM=";
+    hash = "sha256-gwug+eVzFa0mL+dvASHQ/cLq4/nIzl6CvigPIep7v1E=";
   };
 
   sourceRoot = "${src.name}/libs/prebuilt";
diff --git a/pkgs/development/python-modules/langgraph/default.nix b/pkgs/development/python-modules/langgraph/default.nix
index b72307792d0d..8dd0e2c7ae40 100644
--- a/pkgs/development/python-modules/langgraph/default.nix
+++ b/pkgs/development/python-modules/langgraph/default.nix
@@ -40,14 +40,14 @@
 }:
 buildPythonPackage rec {
   pname = "langgraph";
-  version = "1.0.5";
+  version = "1.0.7";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langgraph";
     tag = version;
-    hash = "sha256-QvnBb69JxOVfZ/22igX+WVatJNAUrHUrh3aIpztYmmc=";
+    hash = "sha256-gwug+eVzFa0mL+dvASHQ/cLq4/nIzl6CvigPIep7v1E=";
   };
 
   postgresqlTestSetupPost = ''