diff --git a/src/modules/aix/server/dispatch/chatGenerate/chatGenerate.dispatch.ts b/src/modules/aix/server/dispatch/chatGenerate/chatGenerate.dispatch.ts
index 1c4390804..d7d1d5b30 100644
--- a/src/modules/aix/server/dispatch/chatGenerate/chatGenerate.dispatch.ts
+++ b/src/modules/aix/server/dispatch/chatGenerate/chatGenerate.dispatch.ts
@@ -49,14 +49,24 @@ export function createChatGenerateDispatch(access: AixAPI_Access, model: AixAPI_
   const { dialect } = access;
   switch (dialect) {
     case 'anthropic': {
+
+      // [Anthropic, 2025-11-24] Detect if any tool uses Programmatic Tool Calling features (allowed_callers, input_examples)
+      const usesProgrammaticToolCalling = chatGenerate.tools?.some(tool =>
+          tool.type === 'function_call' && (
+            tool.function_call.allowed_callers?.includes('code_execution') ||
+            (tool.function_call.input_examples && tool.function_call.input_examples.length > 0)
+          ),
+      ) ?? false;
+
       const anthropicRequest = anthropicAccess(access, '/v1/messages', {
         modelIdForBetaFeatures: model.id,
         vndAntWebFetch: model.vndAntWebFetch === 'auto',
         vndAnt1MContext: model.vndAnt1MContext === true,
         vndAntEffort: !!model.vndAntEffort,
         enableSkills: !!model.vndAntSkills,
-        enableToolSearch: !!model.vndAntToolSearch,
         enableStrictOutputs: !!model.strictJsonOutput || !!model.strictToolInvocations, // [Anthropic, 2025-11-13] for both JSON output and grammar-constrained tool invocations inputs
+        enableToolSearch: !!model.vndAntToolSearch,
+        enableProgrammaticToolCalling: usesProgrammaticToolCalling,
         // enableCodeExecution: ...
       });
 
diff --git a/src/modules/llms/server/anthropic/anthropic.access.ts b/src/modules/llms/server/anthropic/anthropic.access.ts
index e2b362247..00160241e 100644
--- a/src/modules/llms/server/anthropic/anthropic.access.ts
+++ b/src/modules/llms/server/anthropic/anthropic.access.ts
@@ -77,8 +77,9 @@ export type AnthropicHeaderOptions = {
   vndAntEffort?: boolean; // [Anthropic, effort-2025-11-24]
   enableSkills?: boolean;
   enableCodeExecution?: boolean;
-  enableToolSearch?: boolean; // [Anthropic, 2025-11-24] Tool Search Tool
   enableStrictOutputs?: boolean; // [Anthropic, 2025-11-13] Structured Outputs (JSON outputs & strict tool use)
+  enableToolSearch?: boolean; // [Anthropic, 2025-11-24] Tool Search Tool
+  enableProgrammaticToolCalling?: boolean; // [Anthropic, 2025-11-24] Programmatic Tool Calling (allowed_callers, input_examples)
   clientSideFetch?: boolean; // whether the request will be made from client-side (browser) - adds CORS header
 };
 
@@ -163,8 +164,9 @@ function _anthropicHeaders(options?: AnthropicHeaderOptions): Record<string, str
   if (options?.vndAntEffort)
     betaFeatures.push('effort-2025-11-24');
 
-  // [Anthropic, 2025-11-24] Add beta feature for Tool Search Tool (Claude Opus 4.5, Sonnet 4.5)
-  if (options?.enableToolSearch)
+  // [Anthropic, 2025-11-24] Add beta feature for Advanced Tool Use (Tool Search Tool, Programmatic Tool Calling)
+  // Same beta header covers both features: tool discovery and programmatic calling from code execution
+  if (options?.enableToolSearch || options?.enableProgrammaticToolCalling)
     betaFeatures.push('advanced-tool-use-2025-11-20');
 
   // [Anthropic, 2025-11-13] Add beta feature for Structured Outputs (JSON outputs & strict tool use)