diff --git a/src/anthropic-compat.ts b/src/anthropic-compat.ts
index 8858520..1f4703b 100644
--- a/src/anthropic-compat.ts
+++ b/src/anthropic-compat.ts
@@ -7,6 +7,7 @@ import {
 } from './x402.js';
 import { getOrCreateWallet } from './wallet.js';
 import { validatePrivateKey, validateApiUrl, validateResourceUrl } from './validation.js';
+import { DEFAULT_TIMEOUT } from './client.js';
 
 // ======================================================================
 // Types
@@ -41,7 +42,7 @@ export class AnthropicClient {
     const apiUrl = options.apiUrl ?? 'https://blockrun.ai/api';
     validateApiUrl(apiUrl);
     this._apiUrl = apiUrl.replace(/\/$/, '');
-    this._timeout = options.timeout ?? 60000;
+    this._timeout = options.timeout ?? DEFAULT_TIMEOUT;
   }
 
   private async _getClient(): Promise<import('@anthropic-ai/sdk').default> {
diff --git a/src/client.ts b/src/client.ts
index eeed322..027ead1 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -163,7 +163,7 @@ function resolveDefaultTimeout(): number {
   return 600_000; // 600s
 }
 
-const DEFAULT_TIMEOUT = resolveDefaultTimeout();
+export const DEFAULT_TIMEOUT = resolveDefaultTimeout();
 
 // SDK version for User-Agent header (client identification in server logs)
 const SDK_VERSION = "1.5.0";
diff --git a/src/openai-compat.ts b/src/openai-compat.ts
index f7a4537..4b99a05 100644
--- a/src/openai-compat.ts
+++ b/src/openai-compat.ts
@@ -19,7 +19,7 @@
  * });
  */
 
-import { LLMClient } from "./client";
+import { LLMClient, DEFAULT_TIMEOUT } from "./client";
 import type { ChatMessage, ChatResponse, ResponseFormat, Tool, ToolCall, ToolChoice } from "./types";
 
 // OpenAI-compatible types
@@ -272,7 +272,7 @@ export class OpenAI {
   constructor(options: OpenAIClientOptions = {}) {
     const privateKey = options.walletKey || options.privateKey;
     const apiUrl = options.baseURL || "https://blockrun.ai/api";
-    const timeout = options.timeout || 60000;
+    const timeout = options.timeout ?? DEFAULT_TIMEOUT;
 
     this.client = new LLMClient({
       privateKey: privateKey as `0x${string}`,
diff --git a/src/types.ts b/src/types.ts
index e3482c9..663fe51 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -287,7 +287,7 @@ export interface LLMClientOptions {
   privateKey?: `0x${string}` | string;
   /** API endpoint URL (default: https://blockrun.ai/api) */
   apiUrl?: string;
-  /** Request timeout in milliseconds (default: 60000) */
+  /** Request timeout in milliseconds (default: 600000 / 600s; override via BLOCKRUN_CHAT_TIMEOUT env, in seconds) */
   timeout?: number;
 }
 
@@ -953,7 +953,7 @@ export interface PhoneClientOptions {
   privateKey?: `0x${string}` | string;
   /** API endpoint URL (default: https://blockrun.ai/api) */
   apiUrl?: string;
-  /** Request timeout in milliseconds (default: 60000) */
+  /** Request timeout in milliseconds (default: 600000 / 600s; override via BLOCKRUN_CHAT_TIMEOUT env, in seconds) */
   timeout?: number;
 }
 
@@ -1032,7 +1032,7 @@ export interface PortraitClientOptions {
   privateKey?: `0x${string}` | string;
   /** API endpoint URL (default: https://blockrun.ai/api) */
   apiUrl?: string;
-  /** Request timeout in milliseconds (default: 60000) */
+  /** Request timeout in milliseconds (default: 600000 / 600s; override via BLOCKRUN_CHAT_TIMEOUT env, in seconds) */
   timeout?: number;
 }