diff --git a/tools/router-classifier.mjs b/tools/router-classifier.mjs
index 4e7343d..f2e0874 100644
--- a/tools/router-classifier.mjs
+++ b/tools/router-classifier.mjs
@@ -501,14 +501,14 @@ export async function callAnthropicAPI(promptOrMessages, {
   if (typeof promptOrMessages === 'string') {
     body = JSON.stringify({
       model,
-      max_tokens: 66000,
+      max_tokens: 65536,
       messages: [{ role: 'user', content: promptOrMessages }],
     });
   } else {
     const { system, user } = promptOrMessages;
     body = JSON.stringify({
       model,
-      max_tokens: 66000,
+      max_tokens: 65536,
       system: [{ type: 'text', text: system, cache_control: { type: 'ephemeral' } }],
       messages: [{ role: 'user', content: user }],
     });
diff --git a/tools/router-classifier.test.mjs b/tools/router-classifier.test.mjs
index 1f034c9..4f90ffa 100644
--- a/tools/router-classifier.test.mjs
+++ b/tools/router-classifier.test.mjs
@@ -608,24 +608,24 @@ describe('PAMYATKA extensions (Phase 3 brain-retro #9)', () => {
 // plus max_tokens 1500 too low for future long skill chains (silent truncation).
 
 describe('callAnthropicAPI — max_tokens budget for long chains', () => {
-  it('sends max_tokens 66000 for the structured {system,user} form', async () => {
+  it('sends max_tokens 65536 for the structured {system,user} form', async () => {
     let body;
     const fetchImpl = async (url, opts) => {
       body = JSON.parse(opts.body);
       return { ok: true, json: async () => ({ content: [{ text: '{"task_type":"question"}' }] }) };
     };
     await callAnthropicAPI({ system: 'S', user: 'U' }, { apiKey: 'k', fetchImpl });
-    expect(body.max_tokens).toBe(66000);
+    expect(body.max_tokens).toBe(65536);
   });
 
-  it('sends max_tokens 66000 for the legacy string form', async () => {
+  it('sends max_tokens 65536 for the legacy string form', async () => {
     let body;
     const fetchImpl = async (url, opts) => {
       body = JSON.parse(opts.body);
       return { ok: true, json: async () => ({ content: [{ text: '{"task_type":"question"}' }] }) };
     };
     await callAnthropicAPI('hi', { apiKey: 'k', fetchImpl });
-    expect(body.max_tokens).toBe(66000);
+    expect(body.max_tokens).toBe(65536);
   });
 });