diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e5347d0d..2e164fe7e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,29 +1,5 @@
 # Changelog
 
-## [2.32.0](https://github.com/googleapis/python-genai/compare/v2.31.0...v2.32.0) (2026-10-21)
-
-
-### Features
-
-* Add base_voice to PromptedVoice in GAOS SDK ([5488643](https://github.com/googleapis/python-genai/commit/548864370ee9c88de0bd839b619dc05bcb7085e7))
-* Add generation_output_config to GenerateContentConfig ([5c008e1](https://github.com/googleapis/python-genai/commit/5c008e14b9c9fdecbaf61eb53ad7c09f57fa5f8a))
-* Add Live API in-session context updates (`send_context_update`) and types across GenAI SDKs. ([364889a](https://github.com/googleapis/python-genai/commit/364889aafe40bfa8f3b9db847ba272d299f7d632))
-* **sdks:** Enable `fixes.openSingleValueEnumsOct2026` across all SDKs ([78f6d34](https://github.com/googleapis/python-genai/commit/78f6d3412caaaed44f99ce57be2d16d0b8c407cb))
-* Update discovery doc ([6cd176e](https://github.com/googleapis/python-genai/commit/6cd176e135a188bbb0d0f9afca520e7d6483823d))
-
-
-### Bug Fixes
-
-* Base64-encode inline bytes in Live send_tool_response ([a7bbff6](https://github.com/googleapis/python-genai/commit/a7bbff6e73fa9444802cd9a17e8c94e30341bf5d)), refs [#3022](https://github.com/googleapis/python-genai/issues/3022)
-* Don't crash parsing responses with JSON objects in `Any`-typed fields ([4c1abcc](https://github.com/googleapis/python-genai/commit/4c1abccf258c9247218e66610790043893cd6950))
-* **interactions:** Sync InteractionSseEventInteractionStatus enum with InteractionStatus ([ba854b2](https://github.com/googleapis/python-genai/commit/ba854b2d29a3ff0d4758da886edabb458726b210))
-
-
-### Documentation
-
-* Publish the API reference on each release ([1d12358](https://github.com/googleapis/python-genai/commit/1d12358a1398b9a510ae8ba25dd31e746d8e9be9))
-* Transition docs workflow to GitHub Actions ([3b1256a](https://github.com/googleapis/python-genai/commit/3b1256ac5f4b8c49a469ca307ca765185184774d))
-
 ## [2.31.0](https://github.com/googleapis/python-genai/compare/v2.30.1...v2.31.0) (2026-10-14)
 
 
diff --git a/google/genai/_api_client.py b/google/genai/_api_client.py
index d972abc13..82e48973c 100644
--- a/google/genai/_api_client.py
+++ b/google/genai/_api_client.py
@@ -609,6 +609,11 @@ def _load_json_from_response(cls, response: Any) -> Any:
 )
 
 
+def _delay_or_default(value: Optional[float], default: float) -> float:
+  """Returns the default only when the field is unset, so 0.0 is honored."""
+  return default if value is None else value
+
+
 def retry_args(options: Optional[HttpRetryOptions]) -> _common.StringDict:
   """Returns the retry args for the given http retry options.
 
@@ -630,10 +635,10 @@ def retry_args(options: Optional[HttpRetryOptions]) -> _common.StringDict:
       or isinstance(e, _HTTPX_TRANSIENT_EXC),
   )
   wait = tenacity.wait_exponential_jitter(
-      initial=options.initial_delay or _RETRY_INITIAL_DELAY,
-      max=options.max_delay or _RETRY_MAX_DELAY,
-      exp_base=options.exp_base or _RETRY_EXP_BASE,
-      jitter=options.jitter or _RETRY_JITTER,
+      initial=_delay_or_default(options.initial_delay, _RETRY_INITIAL_DELAY),
+      max=_delay_or_default(options.max_delay, _RETRY_MAX_DELAY),
+      exp_base=_delay_or_default(options.exp_base, _RETRY_EXP_BASE),
+      jitter=_delay_or_default(options.jitter, _RETRY_JITTER),
   )
   return {
       'stop': stop,
diff --git a/google/genai/tests/client/test_retries.py b/google/genai/tests/client/test_retries.py
index d02711313..2061ceb46 100644
--- a/google/genai/tests/client/test_retries.py
+++ b/google/genai/tests/client/test_retries.py
@@ -187,6 +187,21 @@ def test_retry_args_enabled_with_custom_values_are_not_overridden():
       assert not retry.predicate(e)
 
 
+def test_retry_args_explicit_zero_values_are_not_overridden():
+  # A field set to 0.0 is specified, so it must reach tenacity instead of
+  # falling back to the default.
+  options = types.HttpRetryOptions(
+      initial_delay=0.0, max_delay=0.0, exp_base=0.0, jitter=0.0
+  )
+
+  wait = api_client.retry_args(options)['wait']
+
+  assert wait.jitter == 0.0
+  assert wait.initial == 0.0
+  assert wait.max == 0.0
+  assert wait.exp_base == 0.0
+
+
 def test_retry_args_retries_httpx_transport_errors():
   # httpx transport errors (timeouts, connect errors) bypass APIError but are
   # transient infrastructure failures, so the predicate must still retry them
diff --git a/google/genai/version.py b/google/genai/version.py
index f2db2d769..65ade1711 100644
--- a/google/genai/version.py
+++ b/google/genai/version.py
@@ -13,4 +13,4 @@
 # limitations under the License.
 #
 
-__version__ = '2.32.0' # x-release-please-version
+__version__ = '2.31.0' # x-release-please-version
diff --git a/pyproject.toml b/pyproject.toml
index 4679764b4..a910909a1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ requires = ["setuptools", "wheel", "twine>=6.1.0", "packaging>=24.2", "pkginfo>=
 
 [project]
 name = "google-genai"
-version = "2.32.0"
+version = "2.31.0"
 description = "GenAI Python SDK"
 readme = "README.md"
 license = "Apache-2.0"