diff --git a/fern/products/sdks/generators/python/changelog/2026-05-20.mdx b/fern/products/sdks/generators/python/changelog/2026-05-20.mdx
index e064ebb97..ae6722577 100644
--- a/fern/products/sdks/generators/python/changelog/2026-05-20.mdx
+++ b/fern/products/sdks/generators/python/changelog/2026-05-20.mdx
@@ -1,3 +1,10 @@
+## 5.14.1
+**`(fix):`** Fix SSE streaming performance regression by caching `pydantic.TypeAdapter` instances
+in `parse_obj_as()`. Previously, a new TypeAdapter was constructed on every call, which
+is extremely expensive for discriminated union types. This caused ~8x slowdown in SSE
+event parsing introduced in v4.51.0 (`parse_sse_obj`).
+
+
 ## 5.14.0
 **`(feat):`** Add support for the `x-fern-base-path` OpenAPI extension. Root path
 parameters declared on the base path are hoisted to the client