diff --git a/CMakeLists.txt b/CMakeLists.txt
index 90ee45183d..48046d1b38 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,8 +9,8 @@ if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.20.0")
   cmake_policy(SET CMP0117 NEW)
 endif()
 
-set(OPENTELEMETRY_VERSION_NUMBER "1.25.0")
-set(OPENTELEMETRY_VERSION_SUFFIX "")
+set(OPENTELEMETRY_VERSION_NUMBER "1.26.0")
+set(OPENTELEMETRY_VERSION_SUFFIX "-dev")
 set(OPENTELEMETRY_VERSION
     "${OPENTELEMETRY_VERSION_NUMBER}${OPENTELEMETRY_VERSION_SUFFIX}")
 
diff --git a/MODULE.bazel b/MODULE.bazel
index 9500ea5c27..5b2e28d8c8 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -3,7 +3,7 @@
 
 module(
     name = "opentelemetry-cpp",
-    version = "1.25.0",
+    version = "1.26.0-dev",
     compatibility_level = 0,
     repo_name = "io_opentelemetry_cpp",
 )
diff --git a/api/include/opentelemetry/version.h b/api/include/opentelemetry/version.h
index 135cdc2399..b6e2ab0f74 100644
--- a/api/include/opentelemetry/version.h
+++ b/api/include/opentelemetry/version.h
@@ -10,9 +10,9 @@
 #  define OPENTELEMETRY_ABI_VERSION_NO 1
 #endif
 
-#define OPENTELEMETRY_VERSION "1.25.0"
+#define OPENTELEMETRY_VERSION "1.26.0-dev"
 #define OPENTELEMETRY_VERSION_MAJOR 1
-#define OPENTELEMETRY_VERSION_MINOR 25
+#define OPENTELEMETRY_VERSION_MINOR 26
 #define OPENTELEMETRY_VERSION_PATCH 0
 
 #define OPENTELEMETRY_ABI_VERSION OPENTELEMETRY_STRINGIFY(OPENTELEMETRY_ABI_VERSION_NO)
diff --git a/sdk/include/opentelemetry/sdk/version/version.h b/sdk/include/opentelemetry/sdk/version/version.h
index 2103cfccf5..df9c4d5ff3 100644
--- a/sdk/include/opentelemetry/sdk/version/version.h
+++ b/sdk/include/opentelemetry/sdk/version/version.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#define OPENTELEMETRY_SDK_VERSION "1.25.0"
+#define OPENTELEMETRY_SDK_VERSION "1.26.0-dev"
 
 #include "opentelemetry/version.h"
 
diff --git a/sdk/src/version/version.cc b/sdk/src/version/version.cc
index 9e4df5f573..d660002482 100644
--- a/sdk/src/version/version.cc
+++ b/sdk/src/version/version.cc
@@ -12,13 +12,13 @@ namespace sdk
 namespace version
 {
 const int major_version    = 1;
-const int minor_version    = 25;
+const int minor_version    = 26;
 const int patch_version    = 0;
-const char *pre_release    = "";
+const char *pre_release    = "dev";
 const char *build_metadata = "none";
-const char *short_version  = "1.25.0";
-const char *full_version   = "1.25.0";
-const char *build_date     = "Sat Feb  7 10:29:31 AM UTC 2026";
+const char *short_version  = "1.26.0";
+const char *full_version   = "1.26.0-dev";
+const char *build_date     = "MAIN BRANCH";
 }  // namespace version
 }  // namespace sdk
 OPENTELEMETRY_END_NAMESPACE
diff --git a/tbump.toml b/tbump.toml
index 8929838a21..9bd83f8192 100644
--- a/tbump.toml
+++ b/tbump.toml
@@ -21,7 +21,7 @@
 github_url = "https://github.com/open-telemetry/opentelemetry-cpp"
 
 [version]
-current = "1.25.0"
+current = "1.26.0-dev"
 
 # Example of a semver regexp.
 # Make sure this matches current_version before