diff --git a/packages/web/src/features/chat/utils.server.ts b/packages/web/src/features/chat/utils.server.ts
index 4e7af7983..2144f5040 100644
--- a/packages/web/src/features/chat/utils.server.ts
+++ b/packages/web/src/features/chat/utils.server.ts
@@ -209,15 +209,16 @@ export const getAISDKLanguageModelAndOptions = async (config: LanguageModel): Pr
                         ? await extractLanguageModelKeyValuePairs(config.headers)
                         : undefined,
                 });
-
                 return {
                     model: anthropic(modelId),
                     providerOptions: {
                         anthropic: {
                             thinking: {
-                                type: "enabled",
-                                budgetTokens: env.ANTHROPIC_THINKING_BUDGET_TOKENS,
-                            }
+                                type: "adaptive",
+                            },
+                            output_config: {
+                                effort: env.ANTHROPIC_THINKING_EFFORT ?? "medium",
+                            },
                         } satisfies AnthropicProviderOptions,
                     },
                 };
@@ -465,4 +466,4 @@ const extractLanguageModelKeyValuePairs = async (
     }
 
     return resolvedPairs;
-};
\ No newline at end of file
+};