diff --git a/backend/danswer/llm/llm_provider_options.py b/backend/danswer/llm/llm_provider_options.py
index 24feeb2f27c6..1bcfdf7e5067 100644
--- a/backend/danswer/llm/llm_provider_options.py
+++ b/backend/danswer/llm/llm_provider_options.py
@@ -95,8 +95,8 @@ def fetch_available_well_known_llms() -> list[WellKnownLLMProviderDescriptor]:
             api_version_required=False,
             custom_config_keys=[],
             llm_names=fetch_models_for_provider(ANTHROPIC_PROVIDER_NAME),
-            default_model="claude-3-opus-20240229",
-            default_fast_model="claude-3-sonnet-20240229",
+            default_model="claude-3-5-sonnet-20240620",
+            default_fast_model="claude-3-5-sonnet-20240620",
         ),
         WellKnownLLMProviderDescriptor(
             name=AZURE_PROVIDER_NAME,
@@ -128,8 +128,8 @@ def fetch_available_well_known_llms() -> list[WellKnownLLMProviderDescriptor]:
                 ),
             ],
             llm_names=fetch_models_for_provider(BEDROCK_PROVIDER_NAME),
-            default_model="anthropic.claude-3-sonnet-20240229-v1:0",
-            default_fast_model="anthropic.claude-3-haiku-20240307-v1:0",
+            default_model="anthropic.claude-3-5-sonnet-20240620-v1:0",
+            default_fast_model="anthropic.claude-3-5-sonnet-20240620-v1:0",
         ),
     ]