diff --git a/pkgs/development/python-modules/groq/default.nix b/pkgs/development/python-modules/groq/default.nix
index 4ef6076c0b60..4d20b8ab00b6 100644
--- a/pkgs/development/python-modules/groq/default.nix
+++ b/pkgs/development/python-modules/groq/default.nix
@@ -22,14 +22,14 @@
 
 buildPythonPackage rec {
   pname = "groq";
-  version = "0.37.1";
+  version = "1.0.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "groq";
     repo = "groq-python";
     tag = "v${version}";
-    hash = "sha256-PWqJK150eIaNIBS8uIoiZwQypES8/i750yc/FrIGdbc=";
+    hash = "sha256-M/W06O2xBvn7iU+62AwvyM7W54arxXViPOK4Jj4uje0=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/langchain-anthropic/default.nix b/pkgs/development/python-modules/langchain-anthropic/default.nix
index d6fdece359b6..ad359bd41e8a 100644
--- a/pkgs/development/python-modules/langchain-anthropic/default.nix
+++ b/pkgs/development/python-modules/langchain-anthropic/default.nix
@@ -24,14 +24,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-anthropic";
-  version = "1.2.0";
+  version = "1.3.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-anthropic==${version}";
-    hash = "sha256-dmuDgKQW1yAz/8tjQx7LaUiuz5Sh4cAyd9nt33mCPbI=";
+    hash = "sha256-/CqnpeQXYdafkly8shen72dIZU3I9o/2TwM903Nw9DA=";
   };
 
   sourceRoot = "${src.name}/libs/partners/anthropic";
@@ -57,10 +57,8 @@ buildPythonPackage rec {
   ];
 
   disabledTests = [
-    # TypeError from Pydantic
-    # https://github.com/langchain-ai/langchain/issues/34068
-    "test_creates_bash_tool"
-    "test_replaces_tool_with_claude_descriptor"
+    # Fails when langchain-core gets ahead of this
+    "test_serdes"
   ];
 
   pythonImportsCheck = [ "langchain_anthropic" ];
diff --git a/pkgs/development/python-modules/langchain-aws/default.nix b/pkgs/development/python-modules/langchain-aws/default.nix
index f58818ba37b2..993321ef59fc 100644
--- a/pkgs/development/python-modules/langchain-aws/default.nix
+++ b/pkgs/development/python-modules/langchain-aws/default.nix
@@ -24,14 +24,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-aws";
-  version = "1.1.0";
+  version = "1.1.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain-aws";
     tag = "langchain-aws==${version}";
-    hash = "sha256-vszpWFKuDZb7DvUhnCROgKJdbyA+slyIhCcIOEuPPhA=";
+    hash = "sha256-tFyVK7IjPy33Az16DhWO6wSL5hBAdyd+urhSvdb18Ww=";
   };
 
   postPatch = ''
@@ -67,6 +67,11 @@ buildPythonPackage rec {
 
   enabledTestPaths = [ "tests/unit_tests" ];
 
+  disabledTests = [
+    # Fails when langchain-core gets ahead of this package
+    "test_serdes"
+  ];
+
   pythonImportsCheck = [ "langchain_aws" ];
 
   passthru = {
diff --git a/pkgs/development/python-modules/langchain-classic/default.nix b/pkgs/development/python-modules/langchain-classic/default.nix
index a2918077e6d5..55b1d910d58f 100644
--- a/pkgs/development/python-modules/langchain-classic/default.nix
+++ b/pkgs/development/python-modules/langchain-classic/default.nix
@@ -35,19 +35,21 @@
   responses,
   syrupy,
   toml,
+
+  # update
+  gitUpdater,
 }:
 
 buildPythonPackage rec {
   pname = "langchain-classic";
-  version = "1.0.0-unstable-2025-11-11";
+  version = "1.0.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
-    # no tagged releases avaialble
-    rev = "3dfea96ec1d2dac4e506d287860ee943c183c9f1";
-    hash = "sha256-U3UllSSa4tFz+nXAP6aNoYceU/xCPbwKSP2F2et+qgQ=";
+    tag = "langchain-classic==${version}";
+    hash = "sha256-4DlKOxt5OoPm38szMEJpw6gDl247eRsx4LZpofUKpUk=";
   };
 
   sourceRoot = "${src.name}/libs/langchain";
@@ -103,10 +105,12 @@ buildPythonPackage rec {
     "test_socket_disabled"
   ];
 
-  # Bulk updater selects wrong tag (there is no tag for this yet)
+  # Bulk updater selects wrong tag
   passthru = {
     skipBulkUpdate = true;
-    updateScript = false;
+    updateScript = gitUpdater {
+      rev-prefix = "langchain-classic==";
+    };
   };
 
   pythonImportsCheck = [ "langchain_classic" ];
diff --git a/pkgs/development/python-modules/langchain-core/default.nix b/pkgs/development/python-modules/langchain-core/default.nix
index 26127cddb86a..816bffad7642 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 = "1.2.2";
+  version = "1.2.5";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-core==${version}";
-    hash = "sha256-WJITm+8XIqezr/2U8HpE0J4hYdzg2Z6tw8b5s6SF6m0=";
+    hash = "sha256-gHIJO5O9AxtROdDuo2UhdkW6p3+4dOJaO6iKelA26gE=";
   };
 
   sourceRoot = "${src.name}/libs/core";
diff --git a/pkgs/development/python-modules/langchain-fireworks/default.nix b/pkgs/development/python-modules/langchain-fireworks/default.nix
index 0b5317257556..44324e662aef 100644
--- a/pkgs/development/python-modules/langchain-fireworks/default.nix
+++ b/pkgs/development/python-modules/langchain-fireworks/default.nix
@@ -60,6 +60,11 @@ buildPythonPackage rec {
 
   enabledTestPaths = [ "tests/unit_tests" ];
 
+  disabledTests = [
+    # Fails when langchain-core gets ahead of this package
+    "test_serdes"
+  ];
+
   pythonImportsCheck = [ "langchain_fireworks" ];
 
   passthru = {
diff --git a/pkgs/development/python-modules/langchain-google-genai/default.nix b/pkgs/development/python-modules/langchain-google-genai/default.nix
index 3871f30d7998..b4fd7b6a4e5b 100644
--- a/pkgs/development/python-modules/langchain-google-genai/default.nix
+++ b/pkgs/development/python-modules/langchain-google-genai/default.nix
@@ -68,7 +68,13 @@ buildPythonPackage rec {
     syrupy
   ];
 
-  pytestFlagsArray = [ "tests/unit_tests" ];
+  enabledTestPaths = [ "tests/unit_tests" ];
+
+  disabledTests = [
+    # Fails when langchain-core gets ahead of this package
+    "test_serdes"
+    "test_serialize"
+  ];
 
   pythonImportsCheck = [ "langchain_google_genai" ];
 
diff --git a/pkgs/development/python-modules/langchain-groq/default.nix b/pkgs/development/python-modules/langchain-groq/default.nix
index e22b989117bd..2d8b16a778c7 100644
--- a/pkgs/development/python-modules/langchain-groq/default.nix
+++ b/pkgs/development/python-modules/langchain-groq/default.nix
@@ -20,14 +20,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-groq";
-  version = "1.1.0";
+  version = "1.1.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-groq==${version}";
-    hash = "sha256-dmuDgKQW1yAz/8tjQx7LaUiuz5Sh4cAyd9nt33mCPbI=";
+    hash = "sha256-WpIP41eALPoWuYjm2ygEH7TwClKYwAG0uEd1ZbbqMTY=";
   };
 
   sourceRoot = "${src.name}/libs/partners/groq";
@@ -38,6 +38,8 @@ buildPythonPackage rec {
     # Each component release requests the exact latest core.
     # That prevents us from updating individual components.
     "langchain-core"
+    # Requires groq api < 1.0.0, but 1.0.0 is backwards compatible
+    "groq"
   ];
 
   dependencies = [
@@ -52,6 +54,12 @@ buildPythonPackage rec {
 
   enabledTestPaths = [ "tests/unit_tests" ];
 
+  disabledTests = [
+    # These tests fail when langchain-core gets ahead of the package
+    "test_groq_serialization"
+    "test_serdes"
+  ];
+
   pythonImportsCheck = [ "langchain_groq" ];
 
   passthru = {
diff --git a/pkgs/development/python-modules/langchain-huggingface/default.nix b/pkgs/development/python-modules/langchain-huggingface/default.nix
index 94fcff8723c8..57e10b63dd9d 100644
--- a/pkgs/development/python-modules/langchain-huggingface/default.nix
+++ b/pkgs/development/python-modules/langchain-huggingface/default.nix
@@ -33,14 +33,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-huggingface";
-  version = "1.1.0";
+  version = "1.2.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-huggingface==${version}";
-    hash = "sha256-dmuDgKQW1yAz/8tjQx7LaUiuz5Sh4cAyd9nt33mCPbI=";
+    hash = "sha256-ucKhuu8J6XudIyjCniJixFq79wPfoCnNBUd6r1U2ieI=";
   };
 
   sourceRoot = "${src.name}/libs/partners/huggingface";
@@ -78,6 +78,11 @@ buildPythonPackage rec {
 
   enabledTestPaths = [ "tests/unit_tests" ];
 
+  disabledTests = [
+    # Requires a circular dependency on langchain
+    "test_init_chat_model_huggingface"
+  ];
+
   pythonImportsCheck = [ "langchain_huggingface" ];
 
   passthru = {
diff --git a/pkgs/development/python-modules/langchain-mistralai/default.nix b/pkgs/development/python-modules/langchain-mistralai/default.nix
index 130f01f33fea..d387144d2a53 100644
--- a/pkgs/development/python-modules/langchain-mistralai/default.nix
+++ b/pkgs/development/python-modules/langchain-mistralai/default.nix
@@ -57,6 +57,8 @@ buildPythonPackage rec {
   disabledTests = [
     # Comparison error due to message formatting differences
     "test__convert_dict_to_message_tool_call"
+    # Fails when langchain-core gets ahead of this package
+    "test_serdes"
   ];
 
   pythonImportsCheck = [ "langchain_mistralai" ];
diff --git a/pkgs/development/python-modules/langchain-openai/default.nix b/pkgs/development/python-modules/langchain-openai/default.nix
index 41d4d63df586..ca02978305cf 100644
--- a/pkgs/development/python-modules/langchain-openai/default.nix
+++ b/pkgs/development/python-modules/langchain-openai/default.nix
@@ -33,14 +33,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-openai";
-  version = "1.1.1";
+  version = "1.1.6";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-openai==${version}";
-    hash = "sha256-WAYzgAWw0y86rBjb2JqLNeBCjVn3o7UfLoQvmQ4SKGU=";
+    hash = "sha256-Y+GV48rlqMfT4TrmoJFGqbHKfc8gxq61NhcUpwSsOwk=";
   };
 
   sourceRoot = "${src.name}/libs/partners/openai";
@@ -80,6 +80,13 @@ buildPythonPackage rec {
     "test_get_num_tokens_from_messages"
     "test_get_token_ids"
     "test_embeddings_respects_token_limit"
+
+    # Fail when langchain-core gets ahead of this package
+    "test_serdes"
+    "test_loads_openai_llm"
+    "test_load_openai_llm"
+    "test_loads_openai_chat"
+    "test_load_openai_chat"
   ];
 
   pythonImportsCheck = [ "langchain_openai" ];
diff --git a/pkgs/development/python-modules/langchain-tests/default.nix b/pkgs/development/python-modules/langchain-tests/default.nix
index 6bb4125fba83..526ca96776a3 100644
--- a/pkgs/development/python-modules/langchain-tests/default.nix
+++ b/pkgs/development/python-modules/langchain-tests/default.nix
@@ -30,14 +30,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-tests";
-  version = "1.1.1";
+  version = "1.1.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-tests==${version}";
-    hash = "sha256-WJITm+8XIqezr/2U8HpE0J4hYdzg2Z6tw8b5s6SF6m0=";
+    hash = "sha256-g5s7zL4l/kIUoIu7/3+Ve3SXW3O9tj8f2N3bZ0gbBts=";
   };
 
   sourceRoot = "${src.name}/libs/standard-tests";
diff --git a/pkgs/development/python-modules/langchain-text-splitters/default.nix b/pkgs/development/python-modules/langchain-text-splitters/default.nix
index 2740e682a1c8..242c1e726c5c 100644
--- a/pkgs/development/python-modules/langchain-text-splitters/default.nix
+++ b/pkgs/development/python-modules/langchain-text-splitters/default.nix
@@ -21,14 +21,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-text-splitters";
-  version = "1.0.0";
+  version = "1.1.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-text-splitters==${version}";
-    hash = "sha256-DOWd94Vx61OS1OI2uIZVonf6BiXkjbS2pTrzleKvifM=";
+    hash = "sha256-/mhgWYmnzzCnAlBzPFHo4yZLxgHIzmvxjS2BilGxww8=";
   };
 
   sourceRoot = "${src.name}/libs/text-splitters";
diff --git a/pkgs/development/python-modules/langchain-xai/default.nix b/pkgs/development/python-modules/langchain-xai/default.nix
index 435a491a2b32..f9cec82314a6 100644
--- a/pkgs/development/python-modules/langchain-xai/default.nix
+++ b/pkgs/development/python-modules/langchain-xai/default.nix
@@ -61,12 +61,11 @@ buildPythonPackage rec {
 
   enabledTestPaths = [ "tests/unit_tests" ];
 
-  disabledTests =
-    lib.optionals (stdenvNoCC.hostPlatform.isLinux && stdenvNoCC.hostPlatform.isAarch64)
-      [
-        # Compares a diff to a string literal and misses platform differences
-        "test_serdes"
-      ];
+  disabledTests = [
+    # Breaks when langchain-core is updated
+    # Also: Compares a diff to a string literal and misses platform differences (aarch64-linux)
+    "test_serdes"
+  ];
 
   pythonImportsCheck = [ "langchain_xai" ];
 
diff --git a/pkgs/development/python-modules/langchain/default.nix b/pkgs/development/python-modules/langchain/default.nix
index f0cc30d47699..edd0a43514cf 100644
--- a/pkgs/development/python-modules/langchain/default.nix
+++ b/pkgs/development/python-modules/langchain/default.nix
@@ -46,14 +46,14 @@
 
 buildPythonPackage rec {
   pname = "langchain";
-  version = "1.1.3";
+  version = "1.2.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain==${version}";
-    hash = "sha256-oW1Gn7ChRwUThrnkNBcGKn96sqRO84rSf75J2bNdBMY=";
+    hash = "sha256-DximXCwrDSUVXZenUrubuGcxdnRCPCPMgdW9UJnkGnE=";
   };
 
   sourceRoot = "${src.name}/libs/langchain_v1";