diff --git a/src/anthropic/lib/bedrock/_beta_messages.py b/src/anthropic/lib/bedrock/_beta_messages.py
index 332f6fba..59bafcc3 100644
--- a/src/anthropic/lib/bedrock/_beta_messages.py
+++ b/src/anthropic/lib/bedrock/_beta_messages.py
@@ -13,6 +13,7 @@
 
 class Messages(SyncAPIResource):
     create = FirstPartyMessagesAPI.create
+    count_tokens = FirstPartyMessagesAPI.count_tokens
 
     @cached_property
     def with_raw_response(self) -> MessagesWithRawResponse:
@@ -36,6 +37,7 @@ def with_streaming_response(self) -> MessagesWithStreamingResponse:
 
 class AsyncMessages(AsyncAPIResource):
     create = FirstPartyAsyncMessagesAPI.create
+    count_tokens = FirstPartyAsyncMessagesAPI.count_tokens
 
     @cached_property
     def with_raw_response(self) -> AsyncMessagesWithRawResponse:
diff --git a/src/anthropic/lib/bedrock/_client.py b/src/anthropic/lib/bedrock/_client.py
index 013d2702..e4a5beae 100644
--- a/src/anthropic/lib/bedrock/_client.py
+++ b/src/anthropic/lib/bedrock/_client.py
@@ -61,7 +61,7 @@ def _prepare_options(input_options: FinalRequestOptions) -> FinalRequestOptions:
     if options.url.startswith("/v1/messages/batches"):
         raise AnthropicError("The Batch API is not supported in Bedrock yet")
 
-    if options.url == "/v1/messages/count_tokens":
+    if options.url in {"/v1/messages/count_tokens", "/v1/messages/count_tokens?beta=true"}:
         raise AnthropicError("Token counting is not supported in Bedrock yet")
 
     return options