diff --git a/.fern/metadata.json b/.fern/metadata.json
index 0f155d5..f4f7a0d 100644
--- a/.fern/metadata.json
+++ b/.fern/metadata.json
@@ -14,5 +14,5 @@
     },
     "exclude_types_from_init_exports": true
   },
-  "originGitCommit": "37ba641a90aa4496eb97146f05555706aaf92670"
+  "originGitCommit": "3fdb45ab45802742325afca544fdc22f5ae58db8"
 }
\ No newline at end of file
diff --git a/.fern/replay.lock b/.fern/replay.lock
index 9c78b96..a1ce605 100644
--- a/.fern/replay.lock
+++ b/.fern/replay.lock
@@ -60,14 +60,20 @@ generations:
     cli_version: unknown
     generator_versions:
       fernapi/fern-python-sdk: 4.37.0
-current_generation: 48b0250bddbc7acc02cd9da9fa06c1fefe1dd0f7
+  - commit_sha: 3885ea61224cbf0671c305350b8d1cddef509443
+    tree_hash: 2b9a17c0608360e1eb6044e97e414ae3d936d857
+    timestamp: 2026-09-09T15:14:03.378Z
+    cli_version: unknown
+    generator_versions:
+      fernapi/fern-python-sdk: 4.37.0
+current_generation: 3885ea61224cbf0671c305350b8d1cddef509443
 patches:
   - id: patch-13d8e068
     content_hash: sha256:97d879ab169016b9abaf1866427a8ebc45af608f69e063a07e5126c9613c329b
     original_commit: 13d8e0683ffa08bcfc9a381eb9604adf5abdbe0b
     original_message: "chore: ignore local venv and planning docs"
     original_author: plutoless <qianze.zhang@hotmail.com>
-    base_generation: 48b0250bddbc7acc02cd9da9fa06c1fefe1dd0f7
+    base_generation: 3885ea61224cbf0671c305350b8d1cddef509443
     files:
       - .gitignore
     patch_content: |
@@ -96,7 +102,7 @@ patches:
     original_commit: a065088b4c45e2ca7e1bb91b1a899b8444800121
     original_message: "fix(vendors): send Speechmatics STT key instead of api_key"
     original_author: digitallysavvy <hermes.frangoudis@gmail.com>
-    base_generation: 48b0250bddbc7acc02cd9da9fa06c1fefe1dd0f7
+    base_generation: 3885ea61224cbf0671c305350b8d1cddef509443
     files:
       - src/agora_agent/types/speechmatics_asr_params.py
     patch_content: |
diff --git a/src/agora_agent/types/gemini_asr_params.py b/src/agora_agent/types/gemini_asr_params.py
index 0e9714a..ef064ef 100644
--- a/src/agora_agent/types/gemini_asr_params.py
+++ b/src/agora_agent/types/gemini_asr_params.py
@@ -5,6 +5,7 @@
 import pydantic
 from ..core.pydantic_utilities import IS_PYDANTIC_V2
 from ..core.unchecked_base_model import UncheckedBaseModel
+from .gemini_asr_params_mode import GeminiAsrParamsMode
 
 
 class GeminiAsrParams(UncheckedBaseModel):
@@ -32,9 +33,29 @@ class GeminiAsrParams(UncheckedBaseModel):
     The language code for speech recognition. This takes precedence over the top-level `asr.language` value.
     """
 
+    language_hints: typing.Optional[typing.List[str]] = pydantic.Field(default=None)
+    """
+    Candidate language codes for transcription. When non-empty, these take precedence over language.
+    """
+
+    custom_vocabulary: typing.Optional[typing.List[str]] = pydantic.Field(default=None)
+    """
+    Words and phrases used to bias transcription. A non-empty custom vocabulary cannot be combined with word_timestamp.
+    """
+
+    mode: typing.Optional[GeminiAsrParamsMode] = pydantic.Field(default=None)
+    """
+    Transcription output mode. SMART removes disfluencies and applies formatting; VERBATIM preserves literal speech. When omitted, the service defaults to VERBATIM. SMART cannot be combined with word_timestamp or diarization.
+    """
+
     word_timestamp: typing.Optional[bool] = pydantic.Field(default=None)
     """
-    Whether to include word-level timestamps in the transcription results.
+    Whether to include word-level timestamps in the transcription results. Cannot be enabled when mode is SMART or custom_vocabulary is non-empty.
+    """
+
+    diarization: typing.Optional[bool] = pydantic.Field(default=None)
+    """
+    Whether to include speaker labels in the transcription results. Cannot be enabled when mode is SMART.
     """
 
     if IS_PYDANTIC_V2:
diff --git a/src/agora_agent/types/gemini_asr_params_mode.py b/src/agora_agent/types/gemini_asr_params_mode.py
new file mode 100644
index 0000000..75bbc7a
--- /dev/null
+++ b/src/agora_agent/types/gemini_asr_params_mode.py
@@ -0,0 +1,5 @@
+# This file was auto-generated by Fern from our API Definition.
+
+import typing
+
+GeminiAsrParamsMode = typing.Union[typing.Literal["SMART", "VERBATIM"], typing.Any]