diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 8264c8d813..f8a9e0a2e5 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1 +1 @@
-{".":"4.34.0","packages/phoenix-evals":"0.16.0","packages/phoenix-otel":"0.5.1"}
\ No newline at end of file
+{".":"4.35.0","packages/phoenix-evals":"0.16.0","packages/phoenix-otel":"0.5.1"}
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index edd1c8397d..a3fe7687a3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [4.35.0](https://github.com/Arize-ai/phoenix/compare/arize-phoenix-v4.34.0...arize-phoenix-v4.35.0) (2024-09-17)
+
+
+### Features
+
+* adds o1 testing demo project ([#4636](https://github.com/Arize-ai/phoenix/issues/4636)) ([8140eaf](https://github.com/Arize-ai/phoenix/commit/8140eafba457b443aa4684bd2ecf978ed0dc85df))
+
 ## [4.34.0](https://github.com/Arize-ai/phoenix/compare/arize-phoenix-v4.33.2...arize-phoenix-v4.34.0) (2024-09-17)
 
 
diff --git a/src/phoenix/version.py b/src/phoenix/version.py
index 884ed1d1e5..b70a6d514d 100644
--- a/src/phoenix/version.py
+++ b/src/phoenix/version.py
@@ -1 +1 @@
-__version__ = "4.34.0"
+__version__ = "4.35.0"