diff --git a/CHANGELOG.md b/CHANGELOG.md
index 73a1c13b2..300c65f2b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -100,6 +100,7 @@ This release changes the pinned API version to 2026-07-29.dahlia.
   * Add support for `additional_addresses` on `V2.Core.Account.Identity.BusinessDetail`, `v2.core.AccountCreateParamsIdentityBusinessDetail`, `v2.core.AccountModifyParamsIdentityBusinessDetail`, and `v2.core.AccountTokenCreateParamsIdentityBusinessDetail`
   * Add support for snapshot events `financial_connections.account.expected_deactivation_date_updated`, `financial_connections.account.supported_payment_method_types_updated`, and `financial_connections.account.upcoming_deactivation` with resource `financial_connections.Account`
   * Add support for snapshot events `financial_connections.authorization.expected_deactivation_date_updated` and `financial_connections.authorization.upcoming_deactivation` with resource `financial_connections.Authorization`
+  * Enum type annotations for non-exhaustive ("open") enums are now typed as `Union[Literal[...], str]` instead of plain `Literal[...]`. Many Stripe enums are open, meaning new values may appear in new versions of the API. This change ensures these fields have the correct type for both the values known at SDK release time and other values that may be added later. Refer to the [API Reference](https://docs.stripe.com) for the latest set of allowed values.
 * [#1853](https://github.com/stripe/stripe-python/pull/1853) Fix intermittent Windows test flake in async httpx integration tests
 * [#1849](https://github.com/stripe/stripe-python/pull/1849) Use ip address directly instead of localhost to speed up windows tests
 
diff --git a/stripe/__init__.py b/stripe/__init__.py
index e0fa56855..d72c2420b 100644
--- a/stripe/__init__.py
+++ b/stripe/__init__.py
@@ -30,6 +30,7 @@
 upload_api_base: str = DEFAULT_UPLOAD_API_BASE
 meter_events_api_base: str = DEFAULT_METER_EVENTS_API_BASE
 api_version: str = _ApiVersion.CURRENT
+major_api_version: str = _ApiVersion.CURRENT_MAJOR
 verify_ssl_certs: bool = True
 proxy: Optional[str] = None
 default_http_client: Optional["HTTPClient"] = None
diff --git a/stripe/_api_version.py b/stripe/_api_version.py
index 5bc23ba39..5ca2c61e3 100644
--- a/stripe/_api_version.py
+++ b/stripe/_api_version.py
@@ -2,3 +2,4 @@
 # File generated from our OpenAPI spec
 class _ApiVersion:
     CURRENT = "2026-07-29.preview"
+    CURRENT_MAJOR = ""