From 3002c2ede94e7f380dfffd7c089b6d56aa507958 Mon Sep 17 00:00:00 2001
From: Robert Craigie <robert@craigie.dev>
Date: Fri, 1 Nov 2024 15:32:56 +0000
Subject: [PATCH] fix(countTokens): correctly set beta header

---
 src/resources/beta/messages/messages.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/resources/beta/messages/messages.ts b/src/resources/beta/messages/messages.ts
index 156fd6b2..3f39ca3a 100644
--- a/src/resources/beta/messages/messages.ts
+++ b/src/resources/beta/messages/messages.ts
@@ -77,7 +77,7 @@ export class Messages extends APIResource {
       body,
       ...options,
       headers: {
-        ...(betas?.toString() != null ? { 'anthropic-beta': betas?.toString() } : undefined),
+        'anthropic-beta': [...(betas ?? []), 'token-counting-2024-11-01'].toString(),
         ...options?.headers,
       },
     });