diff --git a/VERSION_NUMBER b/VERSION_NUMBER
index ad2191947f7b1..5ff8c4f5d2ad2 100644
--- a/VERSION_NUMBER
+++ b/VERSION_NUMBER
@@ -1 +1 @@
-1.25.0
+1.26.0
diff --git a/csharp/src/Microsoft.ML.OnnxRuntime/Training/NativeTrainingMethods.shared.cs b/csharp/src/Microsoft.ML.OnnxRuntime/Training/NativeTrainingMethods.shared.cs
index 593798bc3b37b..7756250608ff9 100644
--- a/csharp/src/Microsoft.ML.OnnxRuntime/Training/NativeTrainingMethods.shared.cs
+++ b/csharp/src/Microsoft.ML.OnnxRuntime/Training/NativeTrainingMethods.shared.cs
@@ -76,7 +76,7 @@ static NativeTrainingMethods()
                 DOrtGetApi OrtGetApi = (DOrtGetApi)Marshal.GetDelegateForFunctionPointer(NativeMethods.OrtGetApiBase().GetApi, typeof(DOrtGetApi));
 #endif
 
-                const uint ORT_API_VERSION = 23;
+                const uint ORT_API_VERSION = 26;
 #if NETSTANDARD2_0
                 IntPtr ortApiPtr = OrtGetApi(ORT_API_VERSION);
                 api_ = (OrtApi)Marshal.PtrToStructure(ortApiPtr, typeof(OrtApi));
diff --git a/docs/Versioning.md b/docs/Versioning.md
index 904e4f777561e..9e3984db5ba89 100644
--- a/docs/Versioning.md
+++ b/docs/Versioning.md
@@ -61,7 +61,7 @@ npm --version    # Should be v8.0 or newer
 
    The script does **not** update the value of `ORT_API_VERSION` in [include/onnxruntime/core/session/onnxruntime_c_api.h](../include/onnxruntime/core/session/onnxruntime_c_api.h).
 
-   The value should be set to the second component of the version string. E.g., `25` for version `1.25.0`.
+   The value should be set to the second component of the version string. E.g., `26` for version `1.26.0`.
 
 5. **Review all changes**
 
diff --git a/docs/python/README.rst b/docs/python/README.rst
index b733bf3198329..0e03575236613 100644
--- a/docs/python/README.rst
+++ b/docs/python/README.rst
@@ -8,6 +8,11 @@ For more information on ONNX Runtime, please see `aka.ms/onnxruntime <https://ak
 Changes
 -------
 
+1.26.0
+^^^^^^
+
+Release Notes : https://github.com/Microsoft/onnxruntime/releases/tag/v1.26.0
+
 1.25.0
 ^^^^^^
 
diff --git a/include/onnxruntime/core/session/onnxruntime_c_api.h b/include/onnxruntime/core/session/onnxruntime_c_api.h
index 7afafa8c085ee..48c3d9c39421d 100644
--- a/include/onnxruntime/core/session/onnxruntime_c_api.h
+++ b/include/onnxruntime/core/session/onnxruntime_c_api.h
@@ -38,7 +38,7 @@
  *
  * This value is used by some API functions to behave as this version of the header expects.
  */
-#define ORT_API_VERSION 25
+#define ORT_API_VERSION 26
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/js/common/lib/version.ts b/js/common/lib/version.ts
index 7fa249afd8ac1..6957caf427f59 100644
--- a/js/common/lib/version.ts
+++ b/js/common/lib/version.ts
@@ -4,4 +4,4 @@
 // This file is generated by /js/scripts/update-version.ts
 // Do not modify file content manually.
 
-export const version = '1.25.0';
+export const version = '1.26.0';
diff --git a/js/common/package-lock.json b/js/common/package-lock.json
index dc125288eaee5..373d5697f185d 100644
--- a/js/common/package-lock.json
+++ b/js/common/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "onnxruntime-common",
-  "version": "1.25.0",
+  "version": "1.26.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "onnxruntime-common",
-      "version": "1.25.0",
+      "version": "1.26.0",
       "license": "MIT",
       "devDependencies": {
         "globby": "^15.0.0",
diff --git a/js/common/package.json b/js/common/package.json
index bbb6ae48f1aa9..6746115c97f76 100644
--- a/js/common/package.json
+++ b/js/common/package.json
@@ -2,7 +2,7 @@
   "license": "MIT",
   "type": "module",
   "name": "onnxruntime-common",
-  "version": "1.25.0",
+  "version": "1.26.0",
   "repository": {
     "url": "https://github.com/Microsoft/onnxruntime.git",
     "type": "git"
diff --git a/js/node/lib/version.ts b/js/node/lib/version.ts
index 7fa249afd8ac1..6957caf427f59 100644
--- a/js/node/lib/version.ts
+++ b/js/node/lib/version.ts
@@ -4,4 +4,4 @@
 // This file is generated by /js/scripts/update-version.ts
 // Do not modify file content manually.
 
-export const version = '1.25.0';
+export const version = '1.26.0';
diff --git a/js/node/package-lock.json b/js/node/package-lock.json
index d94de095555b3..d7e9867590377 100644
--- a/js/node/package-lock.json
+++ b/js/node/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "onnxruntime-node",
-  "version": "1.25.0",
+  "version": "1.26.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "onnxruntime-node",
-      "version": "1.25.0",
+      "version": "1.26.0",
       "hasInstallScript": true,
       "license": "MIT",
       "os": [
@@ -30,7 +30,7 @@
     },
     "../common": {
       "name": "onnxruntime-common",
-      "version": "1.25.0",
+      "version": "1.26.0",
       "license": "MIT",
       "devDependencies": {
         "globby": "^15.0.0",
diff --git a/js/node/package.json b/js/node/package.json
index 18c2b2ce9c905..613d227b048fd 100644
--- a/js/node/package.json
+++ b/js/node/package.json
@@ -11,7 +11,7 @@
       6
     ]
   },
-  "version": "1.25.0",
+  "version": "1.26.0",
   "dependencies": {
     "adm-zip": "^0.5.16",
     "global-agent": "^4.1.3",
diff --git a/js/node/script/install-metadata-versions.js b/js/node/script/install-metadata-versions.js
index 5f4818c82e78c..f4238d1981b45 100644
--- a/js/node/script/install-metadata-versions.js
+++ b/js/node/script/install-metadata-versions.js
@@ -4,4 +4,4 @@
 // This file is generated by /js/scripts/update-version.ts
 // Do not modify file content manually.
 
-module.exports = { nuget: [{ feed: 'nuget', version: '1.25.0' }] };
+module.exports = { nuget: [{ feed: 'nuget', version: '1.26.0' }] };
diff --git a/js/react_native/lib/version.ts b/js/react_native/lib/version.ts
index 7fa249afd8ac1..6957caf427f59 100644
--- a/js/react_native/lib/version.ts
+++ b/js/react_native/lib/version.ts
@@ -4,4 +4,4 @@
 // This file is generated by /js/scripts/update-version.ts
 // Do not modify file content manually.
 
-export const version = '1.25.0';
+export const version = '1.26.0';
diff --git a/js/react_native/package-lock.json b/js/react_native/package-lock.json
index fdbc414b284a7..06e97afaac587 100644
--- a/js/react_native/package-lock.json
+++ b/js/react_native/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "onnxruntime-react-native",
-  "version": "1.25.0",
+  "version": "1.26.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "onnxruntime-react-native",
-      "version": "1.25.0",
+      "version": "1.26.0",
       "license": "MIT",
       "dependencies": {
         "onnxruntime-common": "file:../common"
@@ -30,7 +30,7 @@
     },
     "../common": {
       "name": "onnxruntime-common",
-      "version": "1.25.0",
+      "version": "1.26.0",
       "license": "MIT",
       "devDependencies": {
         "globby": "^15.0.0",
diff --git a/js/react_native/package.json b/js/react_native/package.json
index f8b284b208c23..854e66c6f7239 100644
--- a/js/react_native/package.json
+++ b/js/react_native/package.json
@@ -37,7 +37,7 @@
     "registry": "https://registry.npmjs.org/"
   },
   "source": "lib/index",
-  "version": "1.25.0",
+  "version": "1.26.0",
   "main": "dist/commonjs/index",
   "homepage": "https://github.com/microsoft/onnxruntime/blob/main/js/react_native/README.md",
   "files": [
diff --git a/js/web/lib/version.ts b/js/web/lib/version.ts
index 7fa249afd8ac1..6957caf427f59 100644
--- a/js/web/lib/version.ts
+++ b/js/web/lib/version.ts
@@ -4,4 +4,4 @@
 // This file is generated by /js/scripts/update-version.ts
 // Do not modify file content manually.
 
-export const version = '1.25.0';
+export const version = '1.26.0';
diff --git a/js/web/package-lock.json b/js/web/package-lock.json
index a02b86ec1ddc9..b5ec77556e134 100644
--- a/js/web/package-lock.json
+++ b/js/web/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "onnxruntime-web",
-  "version": "1.25.0",
+  "version": "1.26.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "onnxruntime-web",
-      "version": "1.25.0",
+      "version": "1.26.0",
       "license": "MIT",
       "dependencies": {
         "flatbuffers": "^25.1.24",
@@ -50,7 +50,7 @@
     },
     "../common": {
       "name": "onnxruntime-common",
-      "version": "1.25.0",
+      "version": "1.26.0",
       "license": "MIT",
       "devDependencies": {
         "globby": "^15.0.0",
diff --git a/js/web/package.json b/js/web/package.json
index 32e89708a6a2c..64ae093df6603 100644
--- a/js/web/package.json
+++ b/js/web/package.json
@@ -7,7 +7,7 @@
     "type": "git"
   },
   "author": "fs-eire",
-  "version": "1.25.0",
+  "version": "1.26.0",
   "jsdelivr": "dist/ort.min.js",
   "dependencies": {
     "flatbuffers": "^25.1.24",
diff --git a/onnxruntime/__init__.py b/onnxruntime/__init__.py
index 31bf8082fa9cc..9f3349a163e91 100644
--- a/onnxruntime/__init__.py
+++ b/onnxruntime/__init__.py
@@ -10,7 +10,7 @@
 
 import contextlib
 
-__version__ = "1.25.0"
+__version__ = "1.26.0"
 __author__ = "Microsoft"
 
 # we need to do device version validation (for example to check Cuda version for an onnxruntime-training package).
diff --git a/onnxruntime/core/session/interop_api.cc b/onnxruntime/core/session/interop_api.cc
index 3e1afb8947a10..6f208c038a0d4 100644
--- a/onnxruntime/core/session/interop_api.cc
+++ b/onnxruntime/core/session/interop_api.cc
@@ -438,7 +438,7 @@ static constexpr OrtInteropApi ort_interop_api = {
 static_assert(offsetof(OrtInteropApi, SignalSemaphore) / sizeof(void*) == 10,
               "Size of version 24 Api cannot change");  // initial version in ORT 1.24
 static_assert(offsetof(OrtInteropApi, DeinitGraphicsInteropForEpDevice) / sizeof(void*) == 12,
-              "Graphics interop functions at slots 11 and 12");
+              "Size of version 25 API cannot change");
 
 ORT_API(const OrtInteropApi*, OrtInteropAPI::GetInteropApi) {
   return &ort_interop_api;
diff --git a/onnxruntime/core/session/onnxruntime_c_api.cc b/onnxruntime/core/session/onnxruntime_c_api.cc
index f28132d23aa5b..e87d25d742e49 100644
--- a/onnxruntime/core/session/onnxruntime_c_api.cc
+++ b/onnxruntime/core/session/onnxruntime_c_api.cc
@@ -4256,7 +4256,7 @@ Second example, if we wanted to add and remove some members, we'd do this:
     In GetApi we now make it return ort_api_3 for version 3.
 */
 
-static constexpr OrtApi ort_api_1_to_25 = {
+static constexpr OrtApi ort_api_1_to_26 = {
     // NOTE: The ordering of these fields MUST not change after that version has shipped since existing binaries depend on this ordering.
 
     // Shipped as version 1 - DO NOT MODIFY (see above text for more information)
@@ -4803,11 +4803,11 @@ static_assert(offsetof(OrtApi, GetTensorElementTypeAndShapeDataReference) / size
 static_assert(offsetof(OrtApi, KernelInfoGetAttributeArray_string) / sizeof(void*) == 417, "Size of version 25 API cannot change");
 
 // So that nobody forgets to finish an API version, this check will serve as a reminder:
-static_assert(std::string_view(ORT_VERSION) == "1.25.0",
+static_assert(std::string_view(ORT_VERSION) == "1.26.0",
               "ORT_Version change detected, please follow below steps to ensure OrtApi is updated properly");
 // 1. Update the hardcoded version string in above static_assert to silence it
 //
-// 2. If there were any APIs added to ort_api_1_to_25 above:
+// 2. If there were any APIs added to ort_api_1_to_26 above:
 //    a. Add the 'End of version #' markers (pattern above should be obvious)
 //    b. Add a static_assert in the directly above list of version sizes to ensure nobody adds any more functions to the just shipped API version
 //
@@ -4819,7 +4819,7 @@ static_assert(std::string_view(ORT_VERSION) == "1.25.0",
 
 ORT_API(const OrtApi*, OrtApis::GetApi, uint32_t version) {
   if (version >= 1 && version <= ORT_API_VERSION)
-    return &ort_api_1_to_25;
+    return &ort_api_1_to_26;
 
   fprintf(stderr,
           "The requested API version [%u] is not available, only API versions [1, %u] are supported in this build."
diff --git a/samples/cxx/README.md b/samples/cxx/README.md
index 1904c082cef7a..ce1f11a753f41 100644
--- a/samples/cxx/README.md
+++ b/samples/cxx/README.md
@@ -28,10 +28,10 @@ samples/cxx/
 Download and extract an ONNX Runtime release archive. For example:
 
 ```
-tar -xf onnxruntime-win-x64-1.25.0.zip
+tar -xf onnxruntime-win-x64-1.26.0.zip
 ```
 
-This creates a directory like `onnxruntime-win-x64-1.25.0/` containing `include/` and `lib/` subdirectories.
+This creates a directory like `onnxruntime-win-x64-1.26.0/` containing `include/` and `lib/` subdirectories.
 
 ### 2. [Optional] Generate the ONNX model
 
@@ -50,16 +50,16 @@ From the `samples/cxx` directory:
 **Windows:**
 ```
 cmake -S . -B build ^
-    -DORT_HEADER_DIR:PATH=path\to\onnxruntime-win-x64-1.25.0\include ^
-    -DORT_LIBRARY_DIR:PATH=path\to\onnxruntime-win-x64-1.25.0\lib
+    -DORT_HEADER_DIR:PATH=path\to\onnxruntime-win-x64-1.26.0\include ^
+    -DORT_LIBRARY_DIR:PATH=path\to\onnxruntime-win-x64-1.26.0\lib
 cmake --build build --config Release
 ```
 
 **Linux / macOS:**
 ```
 cmake -S . -B build \
-    -DORT_HEADER_DIR:PATH=path/to/onnxruntime-linux-x64-1.25.0/include \
-    -DORT_LIBRARY_DIR:PATH=path/to/onnxruntime-linux-x64-1.25.0/lib
+    -DORT_HEADER_DIR:PATH=path/to/onnxruntime-linux-x64-1.26.0/include \
+    -DORT_LIBRARY_DIR:PATH=path/to/onnxruntime-linux-x64-1.26.0/lib
 cmake --build build --config Release
 ```