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Added stop sequence parameter to ChatBedrock model #290

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Added stop sequence parameter to ChatBedrock model #290

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6ec964f
Added stop sequence parameter to ChatBedrock model
zhaoJoseph Nov 28, 2024
b8571ec
Added stop sequence parameter to ChatBedrock model
zhaoJoseph Dec 16, 2024
709669a
Merge remote-tracking branch 'upstream/main'
zhaoJoseph Dec 16, 2024
7fa51ee
Added field import for stop sequence parameter for chat bedrock model
zhaoJoseph Dec 16, 2024
464745e
Update bedrock.py add pydantic field type for stop sequence
zhaoJoseph Dec 16, 2024
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8 changes: 7 additions & 1 deletion libs/aws/langchain_aws/chat_models/bedrock.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@
from langchain_core.runnables import Runnable, RunnableMap, RunnablePassthrough
from langchain_core.tools import BaseTool
from langchain_core.utils.pydantic import TypeBaseModel, is_basemodel_subclass
from pydantic import BaseModel, ConfigDict, model_validator
from pydantic import BaseModel, ConfigDict, Field, model_validator

from langchain_aws.chat_models.bedrock_converse import ChatBedrockConverse
from langchain_aws.function_calling import (
Expand Down Expand Up @@ -392,6 +392,12 @@ class ChatBedrock(BaseChatModel, BedrockBase):
"""Use the new Bedrock ``converse`` API which provides a standardized interface to
all Bedrock models. Support still in beta. See ChatBedrockConverse docs for more."""

stop_sequences: Optional[List[str]] = Field(default=None, alias="stop")
"""Stop sequence inference parameter from new Bedrock ``converse`` API providing
a sequence of characters that causes a model to stop generating a response. See
https://docs.aws.amazon.com/bedrock/latest/APIReference/API_agent_InferenceConfiguration.html
for more."""

@property
def _llm_type(self) -> str:
"""Return type of chat model."""
Expand Down