diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3c57ff6451..8b315a66ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,50 +15,74 @@ Increment the:
 
 ## [Unreleased]
 
-* [SDK] Apply metric cardinality limits to non-overflow attribute sets and
-  reserve the overflow point separately.
-  [#4236](https://github.com/open-telemetry/opentelemetry-cpp/pull/4236)
-
-* [CODE HEALTH] Move otlp, zipkin and prometheus test classes into anonymous namespace
-  [#4231](https://github.com/open-telemetry/opentelemetry-cpp/pull/4231)
-
-* [CODE HEALTH] Move ext and exporters test classes into anonymous namespace
-  [#4225](https://github.com/open-telemetry/opentelemetry-cpp/pull/4225)
-
-* [CODE HEALTH] Move api/test and sdk/test classes into anonymous namespace
-  [#4217](https://github.com/open-telemetry/opentelemetry-cpp/pull/4217)
-
-* [CMAKE] Fix and test WITH_API_ONLY option
-  [#4201](https://github.com/open-telemetry/opentelemetry-cpp/pull/4201)
-
-* [API] Fix `TraceState::IsValidKey()` to comply with the W3C Trace Context
-  Level 2, where keys containing `@` and keys with more than 241 characters
-  before `@` or more than 14 characters after `@` are now accepted.
-  Only the total 256-character key length limit is enforced.
-  **Note**: this is a correctness fix to an inline API header; the observable
-  behavior of `IsValidKey`, `IsValidKeyRegEx`, and `IsValidKeyNonRegEx`
-  changes (see `docs/abi-policy.md`).
-  [#4194](https://github.com/open-telemetry/opentelemetry-cpp/pull/4194)
-
-* [SDK] Add `TracerProvider::UpdateTracerConfigurator()` and example
-  [#4065](https://github.com/open-telemetry/opentelemetry-cpp/pull/4065)
+## [1.28.0] 2026-07-12
 
 * [RELEASE] Bump main branch to 1.28.0-dev
   [#4081](https://github.com/open-telemetry/opentelemetry-cpp/pull/4081)
 
-* [CODE HEALTH] Fix IWYU Clang22 warnings
+* Bump step-security/harden-runner from 2.19.1 to 2.19.2
+  [#4082](https://github.com/open-telemetry/opentelemetry-cpp/pull/4082)
+
+* Bump step-security/harden-runner from 2.19.2 to 2.19.3
+  [#4084](https://github.com/open-telemetry/opentelemetry-cpp/pull/4084)
+
+* Fix IWYU Clang22 warnings
   [#4083](https://github.com/open-telemetry/opentelemetry-cpp/pull/4083)
 
-* [EXPORTER] Spec-compliant uint64_t attribute encoding in OTLP
-  [#4090](https://github.com/open-telemetry/opentelemetry-cpp/pull/4090)
+* Bump github/codeql-action from 4.35.4 to 4.35.5
+  [#4087](https://github.com/open-telemetry/opentelemetry-cpp/pull/4087)
 
 * [CODE HEALTH] Remove unused alias declarations
   [#4091](https://github.com/open-telemetry/opentelemetry-cpp/pull/4091)
 
+* Bump codecov/codecov-action from 6.0.0 to 6.0.1
+  [#4092](https://github.com/open-telemetry/opentelemetry-cpp/pull/4092)
+
 * [SDK] MeterProvider: do not warn in destructor after explicit Shutdown
   [#4085](https://github.com/open-telemetry/opentelemetry-cpp/pull/4085)
 
-* [CODE HEALTH] Remove last unused nostd namespace alias in otlp_populate
+* Fix: preserve delta start timestamp in fast path
+  [#4069](https://github.com/open-telemetry/opentelemetry-cpp/pull/4069)
+
+* Bump step-security/harden-runner from 2.19.3 to 2.19.4
+  [#4098](https://github.com/open-telemetry/opentelemetry-cpp/pull/4098)
+
+* Bump docker/build-push-action from 7.1.0 to 7.2.0
+  [#4097](https://github.com/open-telemetry/opentelemetry-cpp/pull/4097)
+
+* Bump actions/stale from 10.2.0 to 10.3.0
+  [#4096](https://github.com/open-telemetry/opentelemetry-cpp/pull/4096)
+
+* docs: update custom log handler example
+  [#4089](https://github.com/open-telemetry/opentelemetry-cpp/pull/4089)
+
+* [BUILD] Suppress deprecated warnings in generated semconv metric headers
+  [#4088](https://github.com/open-telemetry/opentelemetry-cpp/pull/4088)
+
+* Bump docker/setup-buildx-action from 4.0.0 to 4.1.0
+  [#4103](https://github.com/open-telemetry/opentelemetry-cpp/pull/4103)
+
+* Bump github/codeql-action from 4.35.5 to 4.36.0
+  [#4102](https://github.com/open-telemetry/opentelemetry-cpp/pull/4102)
+
+* Bump docker/setup-qemu-action from 4.0.0 to 4.1.0
+  [#4107](https://github.com/open-telemetry/opentelemetry-cpp/pull/4107)
+
+* [CI] add cmake gcc maintainer abiv2 job
+  [#4105](https://github.com/open-telemetry/opentelemetry-cpp/pull/4105)
+
+* [DOC] Fix typos in SDK header comments
+  [#4111](https://github.com/open-telemetry/opentelemetry-cpp/pull/4111)
+
+* [CI] update codeql to cover all options with abiv2
+  [#4106](https://github.com/open-telemetry/opentelemetry-cpp/pull/4106)
+
+* [EXPORTER] Convert uint64_t attribute values exceeding
+  INT64_MAX to string per OTel spec
+  [#4090](https://github.com/open-telemetry/opentelemetry-cpp/pull/4090)
+
+* [CODE HEALTH] Remove last unused nostd namespace alias
+  in otlp_populate_attribute_utils
   [#4114](https://github.com/open-telemetry/opentelemetry-cpp/pull/4114)
 
 * [CODE HEALTH] Move curl_http_test classes into anonymous namespace
@@ -67,12 +91,24 @@ Increment the:
 * [CODE HEALTH] Move simple_log_record_processor_test into anonymous namespace
   [#4116](https://github.com/open-telemetry/opentelemetry-cpp/pull/4116)
 
+* Bump actions/checkout from 6.0.2 to 6.0.3
+  [#4118](https://github.com/open-telemetry/opentelemetry-cpp/pull/4118)
+
+* Bump github/codeql-action from 4.36.0 to 4.36.1
+  [#4117](https://github.com/open-telemetry/opentelemetry-cpp/pull/4117)
+
 * [CODE HEALTH] Move registry.cc propagator builders into anonymous namespace
   [#4121](https://github.com/open-telemetry/opentelemetry-cpp/pull/4121)
 
 * [CODE HEALTH] Move sdk_builder.cc builders into anonymous namespace
   [#4122](https://github.com/open-telemetry/opentelemetry-cpp/pull/4122)
 
+* Bump github/codeql-action from 4.36.1 to 4.36.2
+  [#4123](https://github.com/open-telemetry/opentelemetry-cpp/pull/4123)
+
+* [CODE HEALTH] Fix clang-tidy bugprone-exception-escape in sum_aggregation.cc
+  [#4109](https://github.com/open-telemetry/opentelemetry-cpp/pull/4109)
+
 * [CODE HEALTH] Move logger_sdk_test classes into anonymous namespace
   [#4124](https://github.com/open-telemetry/opentelemetry-cpp/pull/4124)
 
@@ -82,90 +118,260 @@ Increment the:
 * [CODE HEALTH] Move func_grpc_main classes into anonymous namespace
   [#4129](https://github.com/open-telemetry/opentelemetry-cpp/pull/4129)
 
-* [CONFIGURATION] Implement missing minimum_severity and trace_based for
-  LoggerConfig declarative configuration
+* [CONFIGURATION] Implementing minimum_severity and trace_based
+  attributes for LoggerConfig
   [#4131](https://github.com/open-telemetry/opentelemetry-cpp/pull/4131)
 
-* [CODE HEALTH] Fix clang-tidy bugprone-exception-escape in ostream exporters
-  [#4137](https://github.com/open-telemetry/opentelemetry-cpp/pull/4137)
+* [SDK] Support TracerConfigurator updates
+  [#4065](https://github.com/open-telemetry/opentelemetry-cpp/pull/4065)
 
-* [API] (ABI v2) `Logger::EmitLogRecord(...)` templates now apply the
-  `Enabled` filter chain when a `Severity` is in args. v1 behavior is
-  unchanged.
-  [#4079](https://github.com/open-telemetry/opentelemetry-cpp/pull/4079)
+* Bump codecov/codecov-action from 6.0.1 to 7.0.0
+  [#4143](https://github.com/open-telemetry/opentelemetry-cpp/pull/4143)
 
-* [API/SDK] (ABI v2) Add `Logger::CreateLogRecord` virtual taking
-  `const nostd::variant<trace::SpanContext, context::Context> &`
-  for explicit-context record creation. `Logger::EmitLogRecord(args...)`
-  also detects a `Context`, `SpanContext`
-  or `TraceId` + `SpanId` [+ `TraceFlags`] in args and routes filtering.
-  [#4079](https://github.com/open-telemetry/opentelemetry-cpp/pull/4079)
+* Bump bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml
+  [#4142](https://github.com/open-telemetry/opentelemetry-cpp/pull/4142)
 
-* [SDK] Add `LogRecordProcessor::HasEnabledFilter()` so the SDK Logger can
-  include processor-level filtering in its extended-enabled cache. Defaults
-  to `true`. Built-in `SimpleLogRecordProcessor` and
-  `BatchLogRecordProcessor` override to `false` since they use the default
-  Enabled.
-  [#4079](https://github.com/open-telemetry/opentelemetry-cpp/pull/4079)
+* [CODE HEALTH] Fix clang-tidy bugprone-exception-escape warnings in API
+  [#3964](https://github.com/open-telemetry/opentelemetry-cpp/pull/3964)
 
-* [API/SDK] Replace `Context`-only signatures on
-  `LogRecordProcessor::Enabled`,
-  `LogRecordProcessor::EnabledImplementation`,
-  `Logger::EnabledImplementation` (v2), and `Logger::CreateLogRecord` (v2)
-  with `nostd::variant<trace::SpanContext, context::Context>`.
+* [API+SDK] apply filtering EmitLogRecord
   [#4079](https://github.com/open-telemetry/opentelemetry-cpp/pull/4079)
 
-* [CI] iwyu and clang-tidy: use install_thirdparty.sh for third-party
+* [CI] iwyu clang tidy install thirdparty script to unify dev container
   [#4136](https://github.com/open-telemetry/opentelemetry-cpp/pull/4136)
 
-* [SDK] LogRecord attribute limits enforcement
-  [#4157](https://github.com/open-telemetry/opentelemetry-cpp/pull/4157)
-
-* [CONFIGURATION] File configuration: declarative resource detection types
-  [#4148](https://github.com/open-telemetry/opentelemetry-cpp/pull/4148)
+* [CONTEXT] Fix env carrier spec compliance
+  [#4141](https://github.com/open-telemetry/opentelemetry-cpp/pull/4141)
 
-* [SDK] Per-instrument creation time as delta first-interval start_ts
+* [SDK] Delta temporality: use per-instrument creation time for first interval start_ts
   [#4144](https://github.com/open-telemetry/opentelemetry-cpp/pull/4144)
 
-* [SDK] Add ComposableSampler and CompositeSampler with the consistent
-  probability sampling variants (AlwaysOn, AlwaysOff, ComposableProbability,
-  ParentThreshold, RuleBased)
-  [#4028](https://github.com/open-telemetry/opentelemetry-cpp/issues/4028)
+* Bump bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml
+  [#4147](https://github.com/open-telemetry/opentelemetry-cpp/pull/4147)
 
-* [SDK] Rename ComposableTraceIdRatioBasedSampler to ComposableProbabilitySampler
-  to align with the OpenTelemetry specification
-  [#4161](https://github.com/open-telemetry/opentelemetry-cpp/issues/4161)
+* [EXPORTER] Add custom HTTP client
+  [#4071](https://github.com/open-telemetry/opentelemetry-cpp/pull/4071)
+
+* docs: add CNCF Slack join instructions
+  [#4153](https://github.com/open-telemetry/opentelemetry-cpp/pull/4153)
+
+* [SDK] Add ComposableSampler interface and CompositeSampler
+  [#4133](https://github.com/open-telemetry/opentelemetry-cpp/pull/4133)
+
+* Bump bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml
+  [#4150](https://github.com/open-telemetry/opentelemetry-cpp/pull/4150)
+
+* [CONFIGURATION] Declarative resource detection types
+  [#4148](https://github.com/open-telemetry/opentelemetry-cpp/pull/4148)
 
 * [BUILD] Fix protobuf build failure
   [#4154](https://github.com/open-telemetry/opentelemetry-cpp/pull/4154)
 
-* [SEMANTIC CONVENTIONS] Generate event name constants (e.g. `semconv::exception::kException`)
+* [SEMANTIC CONVENTIONS] Upgrade to semconv 1.42.0
+  [#4156](https://github.com/open-telemetry/opentelemetry-cpp/pull/4156)
+
+* Bump rules_cc from 0.2.18 to 0.2.19
+  [#4120](https://github.com/open-telemetry/opentelemetry-cpp/pull/4120)
+
+* [CMAKE] upgrade grpc and protobuf
+  [#4167](https://github.com/open-telemetry/opentelemetry-cpp/pull/4167)
+
+* Bump actions/checkout from 6.0.3 to 7.0.0
+  [#4169](https://github.com/open-telemetry/opentelemetry-cpp/pull/4169)
+
+* [BENCHMARK] add span otlp recordable benchmark
+  [#4165](https://github.com/open-telemetry/opentelemetry-cpp/pull/4165)
+
+* [METRICS] Enable synchronous gauge delta temporality
+  and add tests for multi reader path
+  [#4159](https://github.com/open-telemetry/opentelemetry-cpp/pull/4159)
+
+* Add preview support for bound instruments
+  [#4042](https://github.com/open-telemetry/opentelemetry-cpp/pull/4042)
+
+* [API/SDK] add `WITH_LOG_FILTERING_PREVIEW` option
+  [#4160](https://github.com/open-telemetry/opentelemetry-cpp/pull/4160)
+
+* [SEMANTIC CONVENTIONS] semconv generate events
   [#4171](https://github.com/open-telemetry/opentelemetry-cpp/pull/4171)
 
 * [EXPORTER] Handle OTLP partial success response
-  [#4104](https://github.com/open-telemetry/opentelemetry-cpp/pull/4104)
+  [#4104](https://github.com/open-telemetry/openelemetry-cpp/pull/4104)
+
+* Bump rules_cc from 0.2.19 to 0.2.20
+  [#4173](https://github.com/open-telemetry/opentelemetry-cpp/pull/4173)
+
+* [CI] pin ci workflow Bazel on MacOS runner to macos-15
+  [#4176](https://github.com/open-telemetry/opentelemetry-cpp/pull/4176)
+
+* [ADMIN] Revert log filtering preview option
+  [#4174](https://github.com/open-telemetry/opentelemetry-cpp/pull/4174)
+
+* [TEST] fix metrics simple example
+  [#4175](https://github.com/open-telemetry/opentelemetry-cpp/pull/4175)
+
+* [EXPORTER] Replace new operator with std::make_unique
+  [#4181](https://github.com/open-telemetry/opentelemetry-cpp/pull/4181)
+
+* [DOC] update ABI policy docs to clarify breaking changes
+  [#4180](https://github.com/open-telemetry/opentelemetry-cpp/pull/4180)
+
+* [CODE HEALTH] Fix clang-tidy bugprone-exception-escape in ostream exporters
+  [#4137](https://github.com/open-telemetry/opentelemetry-cpp/pull/4137)
+
+* [CMAKE] Upgrade ryml to 0.15.2
+  [#4185](https://github.com/open-telemetry/opentelemetry-cpp/pull/4185)
 
 * [CONFIGURATION] Apply default sampler when none is specified
   [#4170](https://github.com/open-telemetry/opentelemetry-cpp/pull/4170)
 
+* [CMAKE] Upgrade curl to 8.21.0
+  [#4187](https://github.com/open-telemetry/opentelemetry-cpp/pull/4187)
+
+* Bump actions/cache from 5.0.5 to 6.0.0
+  [#4177](https://github.com/open-telemetry/opentelemetry-cpp/pull/4177)
+
+* Bump actions/cache from 6.0.0 to 6.1.0
+  [#4189](https://github.com/open-telemetry/opentelemetry-cpp/pull/4189)
+
+* [API] fix the trace state regex to comply with the w3c trace context level 2
+  [#4194](https://github.com/open-telemetry/opentelemetry-cpp/pull/4194)
+
 * [CODE HEALTH] Move trace and baggage propagation test classes into anonymous namespace
   [#4199](https://github.com/open-telemetry/opentelemetry-cpp/pull/4199)
 
+* [CMAKE] Add pkg-config support for OpenTelemetry proto installation
+  [#4192](https://github.com/open-telemetry/opentelemetry-cpp/pull/4192)
+
+* [CMAKE] Fix CMake WITH_API_ONLY option
+  [#4201](https://github.com/open-telemetry/opentelemetry-cpp/pull/4201)
+
 * [CODE HEALTH] Move context propagation test classes into anonymous namespace
   [#4200](https://github.com/open-telemetry/opentelemetry-cpp/pull/4200)
 
 * [CODE HEALTH] Fix clang-tidy bugprone-unused-local-non-trivial-variable warnings
   [#4202](https://github.com/open-telemetry/opentelemetry-cpp/pull/4202)
 
+* [SDK] LogRecord attribute limits enforcement
+  [#4157](https://github.com/open-telemetry/opentelemetry-cpp/pull/4157)
+
+* [SDK] Rename ComposableTraceIdRatioBasedSampler to ComposableProbabilitySampler
+  [#4210](https://github.com/open-telemetry/opentelemetry-cpp/pull/4210)
+
+* Bump docker/build-push-action from 7.2.0 to 7.3.0
+  [#4204](https://github.com/open-telemetry/opentelemetry-cpp/pull/4204)
+
+* Bump docker/setup-qemu-action from 4.1.0 to 4.2.0
+  [#4205](https://github.com/open-telemetry/opentelemetry-cpp/pull/4205)
+
+* Bump docker/setup-buildx-action from 4.1.0 to 4.2.0
+  [#4207](https://github.com/open-telemetry/opentelemetry-cpp/pull/4207)
+
+* Bump rules_cc from 0.2.20 to 0.2.21
+  [#4214](https://github.com/open-telemetry/opentelemetry-cpp/pull/4214)
+
+* Bump github/codeql-action/upload-sarif from 4.36.2 to 4.36.3
+  [#4213](https://github.com/open-telemetry/opentelemetry-cpp/pull/4213)
+
+* Bump fossas/fossa-action from 1.9.0 to 2.0.0
+  [#4212](https://github.com/open-telemetry/opentelemetry-cpp/pull/4212)
+
+* Bump github/codeql-action/init from 4.36.2 to 4.36.3
+  [#4209](https://github.com/open-telemetry/opentelemetry-cpp/pull/4209)
+
+* [CODE HEALTH] Move api/test and sdk/test classes into anonymous namespace
+  [#4217](https://github.com/open-telemetry/opentelemetry-cpp/pull/4217)
+
 * [CODE HEALTH] Fix clang-tidy bugprone-unchecked-string-to-number-conversion warnings
   [#4216](https://github.com/open-telemetry/opentelemetry-cpp/pull/4216)
 
 * [CODE HEALTH] Fix clang-tidy misc-override-with-different-visibility warnings
   [#4215](https://github.com/open-telemetry/opentelemetry-cpp/pull/4215)
 
+* [BUILD] add missing link dependency for bazel
+  [#4220](https://github.com/open-telemetry/opentelemetry-cpp/pull/4220)
+
 * [CODE HEALTH] Fix clang-tidy `bugprone-throwing-static-initialization` warnings
   [#4206](https://github.com/open-telemetry/opentelemetry-cpp/pull/4206)
 
+* Bump rules_cc from 0.2.21 to 0.2.22
+  [#4223](https://github.com/open-telemetry/opentelemetry-cpp/pull/4223)
+
+* Bump step-security/harden-runner from 2.19.4 to 2.20.0
+  [#4222](https://github.com/open-telemetry/opentelemetry-cpp/pull/4222)
+
+* Bump bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml
+  [#4221](https://github.com/open-telemetry/opentelemetry-cpp/pull/4221)
+
+* [CODE HEALTH] Move ext and exporters test classes into anonymous namespace
+  [#4225](https://github.com/open-telemetry/opentelemetry-cpp/pull/4225)
+
+* Bump github/codeql-action/upload-sarif from 4.36.3 to 4.37.0
+  [#4227](https://github.com/open-telemetry/opentelemetry-cpp/pull/4227)
+
+* Bump github/codeql-action/init from 4.36.3 to 4.37.0
+  [#4229](https://github.com/open-telemetry/opentelemetry-cpp/pull/4229)
+
+* [SEMANTIC CONVENTIONS] Upgrade to semconv 1.43.0
+  [#4230](https://github.com/open-telemetry/opentelemetry-cpp/pull/4230)
+
+* [CODE HEALTH] Move otlp, zipkin and prometheus test classes into anonymous namespace
+  [#4231](https://github.com/open-telemetry/opentelemetry-cpp/pull/4231)
+
+* [BAZEL] Upgrade to rapidyaml 1.15.2
+  [#4234](https://github.com/open-telemetry/opentelemetry-cpp/pull/4234)
+
+* [BENCHMARK] add SpanData recordable benchmark and unify common utils
+  [#4203](https://github.com/open-telemetry/opentelemetry-cpp/pull/4203)
+
+* [CI] Add `modernize-` and `cppcoreguidelines-pro-` checks to clang-tidy (#4238)
+  [#4238](https://github.com/open-telemetry/opentelemetry-cpp/pull/4238)
+
+* [SDK] Apply metric cardinality limits to non-overflow attribute sets and
+  reserve the overflow point separately.
+  [#4236](https://github.com/open-telemetry/opentelemetry-cpp/pull/4236)
+
+* [RELEASE] Release opentelemetry-cpp 1.28.0
+  [#4233](https://github.com/open-telemetry/opentelemetry-cpp/pull/4233)
+
+Important changes:
+
+* [API] fix the trace state regex to comply with the w3c trace context level 2 (#4194)
+  [#4194](https://github.com/open-telemetry/opentelemetry-cpp/pull/4194)
+
+  * [API] Fix `TraceState::IsValidKey()` to comply with the W3C Trace Context
+    Level 2, where keys containing `@` and keys with more than 241 characters
+    before `@` or more than 14 characters after `@` are now accepted.
+    Only the total 256-character key length limit is enforced.
+    **Note**: this is a correctness fix to an inline API header; the observable
+    behavior of `IsValidKey`, `IsValidKeyRegEx`, and `IsValidKeyNonRegEx`
+    changes (see `docs/abi-policy.md`).
+
+* [API+SDK] apply filtering EmitLogRecord (#4079)
+  [#4079](https://github.com/open-telemetry/opentelemetry-cpp/pull/4079)
+
+  * [API] (ABI v2) `Logger::EmitLogRecord(...)` templates now apply the
+    `Enabled` filter chain when a `Severity` is in args. v1 behavior is
+    unchanged.
+
+  * [API/SDK] (ABI v2) Add `Logger::CreateLogRecord` virtual taking
+    `const nostd::variant<trace::SpanContext, context::Context> &`
+    for explicit-context record creation. `Logger::EmitLogRecord(args...)`
+    also detects a `Context`, `SpanContext`
+    or `TraceId` + `SpanId` [+ `TraceFlags`] in args and routes filtering.
+
+  * [SDK] Add `LogRecordProcessor::HasEnabledFilter()` so the SDK Logger can
+    include processor-level filtering in its extended-enabled cache. Defaults
+    to `true`. Built-in `SimpleLogRecordProcessor` and
+    `BatchLogRecordProcessor` override to `false` since they use the default
+    Enabled.
+
+  * [API/SDK] Replace `Context`-only signatures on
+    `LogRecordProcessor::Enabled`,
+    `LogRecordProcessor::EnabledImplementation`,
+    `Logger::EnabledImplementation` (v2), and `Logger::CreateLogRecord` (v2)
+    with `nostd::variant<trace::SpanContext, context::Context>`.
+
 ## [1.27.0] 2026-05-13
 
 * [RELEASE] Bump main branch to 1.27.0-dev
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e44aa1544f..3380189ff4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@ if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.20.0")
 endif()
 
 set(OPENTELEMETRY_VERSION_NUMBER "1.28.0")
-set(OPENTELEMETRY_VERSION_SUFFIX "-dev")
+set(OPENTELEMETRY_VERSION_SUFFIX "")
 set(OPENTELEMETRY_VERSION
     "${OPENTELEMETRY_VERSION_NUMBER}${OPENTELEMETRY_VERSION_SUFFIX}")
 
diff --git a/MODULE.bazel b/MODULE.bazel
index f02a516052..c8d409be41 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -3,7 +3,7 @@
 
 module(
     name = "opentelemetry-cpp",
-    version = "1.28.0-dev",
+    version = "1.28.0",
     compatibility_level = 0,
     repo_name = "io_opentelemetry_cpp",
 )
diff --git a/api/include/opentelemetry/version.h b/api/include/opentelemetry/version.h
index 574d1df49f..48908afe88 100644
--- a/api/include/opentelemetry/version.h
+++ b/api/include/opentelemetry/version.h
@@ -12,7 +12,7 @@
 #endif
 
 // NOLINTBEGIN(cppcoreguidelines-macro-to-enum)
-#define OPENTELEMETRY_VERSION "1.28.0-dev"
+#define OPENTELEMETRY_VERSION "1.28.0"
 #define OPENTELEMETRY_VERSION_MAJOR 1
 #define OPENTELEMETRY_VERSION_MINOR 28
 #define OPENTELEMETRY_VERSION_PATCH 0
diff --git a/sdk/include/opentelemetry/sdk/version/version.h b/sdk/include/opentelemetry/sdk/version/version.h
index 487797e603..5924fa4b74 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 "1.28.0-dev"
+#define OPENTELEMETRY_SDK_VERSION "1.28.0"
 
 #include "opentelemetry/version.h"
 
diff --git a/sdk/src/version/version.cc b/sdk/src/version/version.cc
index f7c6730f4f..0d852458c6 100644
--- a/sdk/src/version/version.cc
+++ b/sdk/src/version/version.cc
@@ -14,16 +14,16 @@ namespace version
 const int major_version    = 1;
 const int minor_version    = 28;
 const int patch_version    = 0;
-const char *pre_release    = "dev";
+const char *pre_release    = "";
 const char *build_metadata = "none";
 const char *short_version  = "1.28.0";
-const char *full_version   = "1.28.0-dev";
+const char *full_version   = "1.28.0";
 /**
  * Release date.
  * For published releases: YYYY-MM-DD
  * For -dev releases: empty string
  */
-const char *build_date = "";
+const char *build_date = "2026-07-12";
 }  // namespace version
 }  // namespace sdk
 OPENTELEMETRY_END_NAMESPACE
diff --git a/tbump.toml b/tbump.toml
index dc0218ae06..e1a3bdd310 100644
--- a/tbump.toml
+++ b/tbump.toml
@@ -21,7 +21,7 @@
 github_url = "https://github.com/open-telemetry/opentelemetry-cpp"
 
 [version]
-current = "1.28.0-dev"
+current = "1.28.0"
 
 # Example of a semver regexp.
 # Make sure this matches current_version before