diff --git a/pyproject.toml b/pyproject.toml
index 8a638938..f413ead8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -250,7 +250,7 @@ keep_model_order = true
 # workflow committing nothing unless the models changed. A local regeneration that only moves this line is that
 # same case - drop it rather than committing it alone.
 [tool.apify.openapi-spec]
-version = "v2-2026-08-31T125154Z"
+version = "v2-2026-10-01T153946Z"
 
 [tool.uv]
 # Minimal defense against supply-chain atatcks.
diff --git a/src/apify_client/_models.py b/src/apify_client/_models.py
index 70b11f4d..7791e253 100644
--- a/src/apify_client/_models.py
+++ b/src/apify_client/_models.py
@@ -595,6 +595,12 @@ class Build(BaseModel):
     build_number: Annotated[
         str, Field(examples=['0.1.1'], pattern='^([0-9]|[1-9][0-9])\\.([0-9]|[1-9][0-9])(\\.[1-9][0-9]{0,4})$')
     ]
+    image_digest: Annotated[
+        str | None, Field(examples=['1b2f1e8c0d5a4c7f9e3b6a2d8c4e0f7a5b9d3c1e6f8a2b4d0c7e9f1a3b5d7c9e'])
+    ] = None
+    """
+    Digest of the built Docker image manifest, without the `sha256:` prefix. Compare digests of two builds to find out whether their image contents differ. `null` if the digest is not available.
+    """
     act_version: Annotated[ActVersion | None, Field(title='BuildActVersion')] = None
     """
     Snapshot of the Actor version that this build was created from.