diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1fc8750c8..5c4c744d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 - feat(example): support server video inputs and Gemma text tool calls by @abetlen in #2291
-- feat: update llama.cpp to ggml-org/llama.cpp@76da2450a
+- feat: update llama.cpp to ggml-org/llama.cpp@ac4cddeb0
 - fix(example): support multi-step Responses tool streaming by @abetlen in #2288
 - fix(ci): Repair Linux accelerator wheels for manylinux publishing
 
diff --git a/vendor/llama.cpp b/vendor/llama.cpp
index 76da2450a..ac4cddeb0 160000
--- a/vendor/llama.cpp
+++ b/vendor/llama.cpp
@@ -1 +1 @@
-Subproject commit 76da2450a4f2cc9ce6c7fc8229e25dc0a4b41e5d
+Subproject commit ac4cddeb0dbd778f650bf568f6f08344a06abe3a