diff --git a/packages/api/src/endpoints/anthropic/llm.spec.js b/packages/api/src/endpoints/anthropic/llm.spec.ts
similarity index 90%
rename from packages/api/src/endpoints/anthropic/llm.spec.js
rename to packages/api/src/endpoints/anthropic/llm.spec.ts
index 38a644b3c5..eea27333db 100644
--- a/packages/api/src/endpoints/anthropic/llm.spec.js
+++ b/packages/api/src/endpoints/anthropic/llm.spec.ts
@@ -1,4 +1,4 @@
-const { getLLMConfig } = require('./llm');
+import { getLLMConfig } from './llm';
 
 jest.mock('https-proxy-agent', () => ({
   HttpsProxyAgent: jest.fn().mockImplementation((proxy) => ({ proxy })),
@@ -25,9 +25,9 @@ describe('getLLMConfig', () => {
     });
 
     expect(result.llmConfig.clientOptions).toHaveProperty('fetchOptions');
-    expect(result.llmConfig.clientOptions.fetchOptions).toHaveProperty('dispatcher');
-    expect(result.llmConfig.clientOptions.fetchOptions.dispatcher).toBeDefined();
-    expect(result.llmConfig.clientOptions.fetchOptions.dispatcher.constructor.name).toBe(
+    expect(result.llmConfig.clientOptions?.fetchOptions).toHaveProperty('dispatcher');
+    expect(result.llmConfig.clientOptions?.fetchOptions?.dispatcher).toBeDefined();
+    expect(result.llmConfig.clientOptions?.fetchOptions?.dispatcher.constructor.name).toBe(
       'ProxyAgent',
     );
   });
@@ -93,9 +93,10 @@ describe('getLLMConfig', () => {
     };
     const result = getLLMConfig('test-key', { modelOptions });
     const clientOptions = result.llmConfig.clientOptions;
-    expect(clientOptions.defaultHeaders).toBeDefined();
-    expect(clientOptions.defaultHeaders).toHaveProperty('anthropic-beta');
-    expect(clientOptions.defaultHeaders['anthropic-beta']).toBe(
+    expect(clientOptions?.defaultHeaders).toBeDefined();
+    expect(clientOptions?.defaultHeaders).toHaveProperty('anthropic-beta');
+    const defaultHeaders = clientOptions?.defaultHeaders as Record<string, string>;
+    expect(defaultHeaders['anthropic-beta']).toBe(
       'prompt-caching-2024-07-31,context-1m-2025-08-07',
     );
   });
@@ -111,9 +112,10 @@ describe('getLLMConfig', () => {
       const modelOptions = { model, promptCache: true };
       const result = getLLMConfig('test-key', { modelOptions });
       const clientOptions = result.llmConfig.clientOptions;
-      expect(clientOptions.defaultHeaders).toBeDefined();
-      expect(clientOptions.defaultHeaders).toHaveProperty('anthropic-beta');
-      expect(clientOptions.defaultHeaders['anthropic-beta']).toBe(
+      expect(clientOptions?.defaultHeaders).toBeDefined();
+      expect(clientOptions?.defaultHeaders).toHaveProperty('anthropic-beta');
+      const defaultHeaders = clientOptions?.defaultHeaders as Record<string, string>;
+      expect(defaultHeaders['anthropic-beta']).toBe(
         'prompt-caching-2024-07-31,context-1m-2025-08-07',
       );
     });
@@ -254,9 +256,9 @@ describe('getLLMConfig', () => {
       });
 
       expect(result.llmConfig.clientOptions).toHaveProperty('fetchOptions');
-      expect(result.llmConfig.clientOptions.fetchOptions).toHaveProperty('dispatcher');
-      expect(result.llmConfig.clientOptions.fetchOptions.dispatcher).toBeDefined();
-      expect(result.llmConfig.clientOptions.fetchOptions.dispatcher.constructor.name).toBe(
+      expect(result.llmConfig.clientOptions?.fetchOptions).toHaveProperty('dispatcher');
+      expect(result.llmConfig.clientOptions?.fetchOptions?.dispatcher).toBeDefined();
+      expect(result.llmConfig.clientOptions?.fetchOptions?.dispatcher.constructor.name).toBe(
         'ProxyAgent',
       );
       expect(result.llmConfig.clientOptions).toHaveProperty('baseURL', 'https://reverse-proxy.com');
@@ -272,7 +274,7 @@ describe('getLLMConfig', () => {
       });
 
       // claude-3-5-sonnet supports prompt caching and should get the appropriate headers
-      expect(result.llmConfig.clientOptions.defaultHeaders).toEqual({
+      expect(result.llmConfig.clientOptions?.defaultHeaders).toEqual({
         'anthropic-beta': 'max-tokens-3-5-sonnet-2024-07-15,prompt-caching-2024-07-31',
       });
     });
diff --git a/packages/api/src/endpoints/anthropic/llm.ts b/packages/api/src/endpoints/anthropic/llm.ts
index 5519ea7c5f..4ed62e4fd2 100644
--- a/packages/api/src/endpoints/anthropic/llm.ts
+++ b/packages/api/src/endpoints/anthropic/llm.ts
@@ -28,7 +28,7 @@ import { checkPromptCacheSupport, getClaudeHeaders, configureReasoning } from '.
  * @returns {Object} Configuration options for creating an Anthropic LLM instance, with null and undefined values removed.
  */
 function getLLMConfig(
-  apiKey: string,
+  apiKey?: string,
   options: AnthropicConfigOptions = {} as AnthropicConfigOptions,
 ): AnthropicLLMConfigResult {
   const systemOptions = {
diff --git a/packages/api/src/types/anthropic.ts b/packages/api/src/types/anthropic.ts
index bbef7dd4b5..8d965fd364 100644
--- a/packages/api/src/types/anthropic.ts
+++ b/packages/api/src/types/anthropic.ts
@@ -1,6 +1,7 @@
 import { z } from 'zod';
-import { AnthropicClientOptions } from '@librechat/agents';
+import { Dispatcher } from 'undici';
 import { anthropicSchema } from 'librechat-data-provider';
+import { AnthropicClientOptions } from '@librechat/agents';
 
 export type AnthropicParameters = z.infer<typeof anthropicSchema>;
 
@@ -22,7 +23,11 @@ export interface AnthropicConfigOptions {
  */
 export interface AnthropicLLMConfigResult {
   /** Configuration options for creating an Anthropic LLM instance */
-  llmConfig: AnthropicClientOptions;
+  llmConfig: AnthropicClientOptions & {
+    clientOptions?: {
+      fetchOptions?: { dispatcher: Dispatcher };
+    };
+  };
   /** Array of tools to be used */
   tools: Array<{
     type: string;
diff --git a/packages/data-provider/src/schemas.ts b/packages/data-provider/src/schemas.ts
index 0e9548b1d0..dc4baebc01 100644
--- a/packages/data-provider/src/schemas.ts
+++ b/packages/data-provider/src/schemas.ts
@@ -619,14 +619,14 @@ export const tConversationSchema = z.object({
   userLabel: z.string().optional(),
   model: z.string().nullable().optional(),
   promptPrefix: z.string().nullable().optional(),
-  temperature: z.number().optional(),
+  temperature: z.number().nullable().optional(),
   topP: z.number().optional(),
   topK: z.number().optional(),
   top_p: z.number().optional(),
   frequency_penalty: z.number().optional(),
   presence_penalty: z.number().optional(),
   parentMessageId: z.string().optional(),
-  maxOutputTokens: coerceNumber.optional(),
+  maxOutputTokens: coerceNumber.nullable().optional(),
   maxContextTokens: coerceNumber.optional(),
   max_tokens: coerceNumber.optional(),
   /* Anthropic */
@@ -634,6 +634,7 @@ export const tConversationSchema = z.object({
   system: z.string().optional(),
   thinking: z.boolean().optional(),
   thinkingBudget: coerceNumber.optional(),
+  stream: z.boolean().optional(),
   /* artifacts */
   artifacts: z.string().optional(),
   /* google */
@@ -1152,6 +1153,8 @@ export const anthropicBaseSchema = tConversationSchema.pick({
   maxContextTokens: true,
   web_search: true,
   fileTokenLimit: true,
+  stop: true,
+  stream: true,
 });
 
 export const anthropicSchema = anthropicBaseSchema