diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 257f0561..40293964 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,7 @@ on:
   pull_request:
     branches:
       - main
+      - next
 
 jobs:
   lint:
diff --git a/.stats.yml b/.stats.yml
index f52da739..29957ee8 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 15
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/togetherai%2FTogetherAI-9bc2a14025495e7ec3f0959f90457cdb215d4fe285151c29dcff03a47796d33a.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/togetherai%2FTogetherAI-bd614fbf1c23ddda5eba5554c84321d7c0e462f19465660c259d50c242fe8be8.yml
diff --git a/README.md b/README.md
index 9aba58bb..c993f3e1 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ It is generated with [Stainless](https://www.stainlessapi.com/).
 
 ## Documentation
 
-The REST API documentation can be found [on docs.together.ai](https://docs.together.ai). The full API of this library can be found in [api.md](api.md).
+The REST API documentation can be found on [docs.together.ai](https://docs.together.ai). The full API of this library can be found in [api.md](api.md).
 
 ## Installation
 
diff --git a/requirements-dev.lock b/requirements-dev.lock
index 63621c40..78809391 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -49,7 +49,7 @@ markdown-it-py==3.0.0
     # via rich
 mdurl==0.1.2
     # via markdown-it-py
-mypy==1.7.1
+mypy==1.10.1
 mypy-extensions==1.0.0
     # via mypy
 nodeenv==1.8.0
diff --git a/src/together/_base_client.py b/src/together/_base_client.py
index 3a1eacee..8a36d721 100644
--- a/src/together/_base_client.py
+++ b/src/together/_base_client.py
@@ -879,9 +879,9 @@ def __exit__(
     def _prepare_options(
         self,
         options: FinalRequestOptions,  # noqa: ARG002
-    ) -> None:
+    ) -> FinalRequestOptions:
         """Hook for mutating the given options"""
-        return None
+        return options
 
     def _prepare_request(
         self,
@@ -961,7 +961,7 @@ def _request(
         input_options = model_copy(options)
 
         cast_to = self._maybe_override_cast_to(cast_to, options)
-        self._prepare_options(options)
+        options = self._prepare_options(options)
 
         retries = self._remaining_retries(remaining_retries, options)
         request = self._build_request(options)
@@ -1442,9 +1442,9 @@ async def __aexit__(
     async def _prepare_options(
         self,
         options: FinalRequestOptions,  # noqa: ARG002
-    ) -> None:
+    ) -> FinalRequestOptions:
         """Hook for mutating the given options"""
-        return None
+        return options
 
     async def _prepare_request(
         self,
@@ -1529,7 +1529,7 @@ async def _request(
         input_options = model_copy(options)
 
         cast_to = self._maybe_override_cast_to(cast_to, options)
-        await self._prepare_options(options)
+        options = await self._prepare_options(options)
 
         retries = self._remaining_retries(remaining_retries, options)
         request = self._build_request(options)
diff --git a/src/together/_compat.py b/src/together/_compat.py
index 74c7639b..c919b5ad 100644
--- a/src/together/_compat.py
+++ b/src/together/_compat.py
@@ -118,10 +118,10 @@ def get_model_fields(model: type[pydantic.BaseModel]) -> dict[str, FieldInfo]:
     return model.__fields__  # type: ignore
 
 
-def model_copy(model: _ModelT) -> _ModelT:
+def model_copy(model: _ModelT, *, deep: bool = False) -> _ModelT:
     if PYDANTIC_V2:
-        return model.model_copy()
-    return model.copy()  # type: ignore
+        return model.model_copy(deep=deep)
+    return model.copy(deep=deep)  # type: ignore
 
 
 def model_json(model: pydantic.BaseModel, *, indent: int | None = None) -> str:
diff --git a/src/together/_models.py b/src/together/_models.py
index 5d95bb4b..eb7ce3bd 100644
--- a/src/together/_models.py
+++ b/src/together/_models.py
@@ -643,6 +643,14 @@ def validate_type(*, type_: type[_T], value: object) -> _T:
     return cast(_T, _validate_non_model_type(type_=type_, value=value))
 
 
+def set_pydantic_config(typ: Any, config: pydantic.ConfigDict) -> None:
+    """Add a pydantic config for the given type.
+
+    Note: this is a no-op on Pydantic v1.
+    """
+    setattr(typ, "__pydantic_config__", config)  # noqa: B010
+
+
 # our use of subclasssing here causes weirdness for type checkers,
 # so we just pretend that we don't subclass
 if TYPE_CHECKING:
diff --git a/src/together/types/chat/chat_completion_usage.py b/src/together/types/chat/chat_completion_usage.py
index 5e804ab5..82b9d450 100644
--- a/src/together/types/chat/chat_completion_usage.py
+++ b/src/together/types/chat/chat_completion_usage.py
@@ -1,7 +1,6 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 
-
 from ..._models import BaseModel
 
 __all__ = ["ChatCompletionUsage"]