From 2f6fe6ddf3801332da9b8ecf17e2d71855910678 Mon Sep 17 00:00:00 2001
From: billytrend-cohere <144115527+billytrend-cohere@users.noreply.github.com>
Date: Tue, 14 Nov 2023 17:23:25 +0000
Subject: [PATCH] Fix latest message index (#13355)

There is a bug which caused the earliest message rather than the latest
message being sent
---
 libs/langchain/langchain/chat_models/cohere.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libs/langchain/langchain/chat_models/cohere.py b/libs/langchain/langchain/chat_models/cohere.py
index 4b09e06aff..632997c98b 100644
--- a/libs/langchain/langchain/chat_models/cohere.py
+++ b/libs/langchain/langchain/chat_models/cohere.py
@@ -80,9 +80,9 @@ def get_cohere_chat_request(
     )
 
     return {
-        "message": messages[0].content,
+        "message": messages[-1].content,
         "chat_history": [
-            {"role": get_role(x), "message": x.content} for x in messages[1:]
+            {"role": get_role(x), "message": x.content} for x in messages[:-1]
         ],
         "documents": documents,
         "connectors": maybe_connectors,