diff --git a/Frontend/.env.example b/Frontend/.env.example
index 7d6ef52..885d467 100644
--- a/Frontend/.env.example
+++ b/Frontend/.env.example
@@ -1,7 +1,17 @@
 DATABASE_URL="file:../../.data/clientsflow-dev.db"
 REDIS_URL="redis://localhost:6379"
 
-# Agent (LangGraph + OpenAI)
+# Agent (LangGraph + OpenRouter)
+OPENROUTER_API_KEY=""
+OPENROUTER_BASE_URL="https://openrouter.ai/api/v1"
+OPENROUTER_MODEL="openai/gpt-4o-mini"
+# Optional headers for OpenRouter ranking/analytics
+OPENROUTER_HTTP_REFERER=""
+OPENROUTER_X_TITLE="clientsflow"
+# Enable reasoning payload for models that support it: 1 or 0
+OPENROUTER_REASONING_ENABLED="0"
+
+# Optional fallback (OpenAI-compatible)
 OPENAI_API_KEY=""
 OPENAI_MODEL="gpt-4o-mini"
 # "langgraph" (default) or "rule"
diff --git a/Frontend/server/agent/crmAgent.ts b/Frontend/server/agent/crmAgent.ts
index 8692e98..212c8ae 100644
--- a/Frontend/server/agent/crmAgent.ts
+++ b/Frontend/server/agent/crmAgent.ts
@@ -102,6 +102,7 @@ export async function runCrmAgentFor(
 ): Promise<AgentReply> {
   const mode = (process.env.CF_AGENT_MODE ?? "langgraph").toLowerCase();
   const llmApiKey =
+    process.env.OPENROUTER_API_KEY ||
     process.env.LLM_API_KEY ||
     process.env.OPENAI_API_KEY ||
     process.env.DASHSCOPE_API_KEY ||
diff --git a/Frontend/server/agent/langgraphCrmAgent.ts b/Frontend/server/agent/langgraphCrmAgent.ts
index 882a0f5..fb3235a 100644
--- a/Frontend/server/agent/langgraphCrmAgent.ts
+++ b/Frontend/server/agent/langgraphCrmAgent.ts
@@ -324,6 +324,13 @@ export async function runLangGraphCrmAgentFor(input: {
   userText: string;
   onTrace?: (event: AgentTraceEvent) => Promise<void> | void;
 }): Promise<AgentReply> {
+  const openrouterApiKey = (process.env.OPENROUTER_API_KEY ?? "").trim();
+  const openrouterBaseURL = (process.env.OPENROUTER_BASE_URL ?? "https://openrouter.ai/api/v1").trim();
+  const openrouterModel = (process.env.OPENROUTER_MODEL ?? "openai/gpt-4o-mini").trim();
+  const openrouterReferer = (process.env.OPENROUTER_HTTP_REFERER ?? "").trim();
+  const openrouterTitle = (process.env.OPENROUTER_X_TITLE ?? "").trim();
+  const openrouterReasoningEnabled = (process.env.OPENROUTER_REASONING_ENABLED ?? "").trim() === "1";
+
   const genericApiKey =
     process.env.LLM_API_KEY ||
     process.env.OPENAI_API_KEY ||
@@ -350,6 +357,19 @@ export async function runLangGraphCrmAgentFor(input: {
   let llmApiKey = genericApiKey;
   let llmBaseURL = genericBaseURL;
   let llmModel = genericModel;
+  let llmHeaders: Record<string, string> | undefined;
+  let llmReasoningEnabled = false;
+
+  if (openrouterApiKey) {
+    llmApiKey = openrouterApiKey;
+    llmBaseURL = openrouterBaseURL;
+    llmModel = openrouterModel;
+    llmReasoningEnabled = openrouterReasoningEnabled;
+    llmHeaders = {
+      ...(openrouterReferer ? { "HTTP-Referer": openrouterReferer } : {}),
+      ...(openrouterTitle ? { "X-Title": openrouterTitle } : {}),
+    };
+  }
 
   if (useGigachat) {
     try {
@@ -374,7 +394,11 @@ export async function runLangGraphCrmAgentFor(input: {
   if (!llmApiKey) {
     return {
       text: "LLM API key не задан. Сейчас включен fallback-агент без LLM.",
-      plan: ["Проверить .env", "Добавить LLM_API_KEY (или OPENAI_API_KEY / DASHSCOPE_API_KEY / QWEN_API_KEY / GIGACHAT_AUTH_KEY+GIGACHAT_SCOPE)", "Перезапустить dev-сервер"],
+      plan: [
+        "Проверить .env",
+        "Добавить OPENROUTER_API_KEY (или LLM_API_KEY / OPENAI_API_KEY / DASHSCOPE_API_KEY / QWEN_API_KEY / GIGACHAT_AUTH_KEY+GIGACHAT_SCOPE)",
+        "Перезапустить dev-сервер",
+      ],
       tools: [],
       thinking: ["LLM недоступна, возвращен fallback-ответ."],
       toolRuns: [],
@@ -808,10 +832,18 @@ export async function runLangGraphCrmAgentFor(input: {
     apiKey: llmApiKey,
     model: llmModel,
     temperature: 0.2,
-    ...(llmBaseURL
+    ...(llmReasoningEnabled
+      ? {
+          modelKwargs: {
+            reasoning: { enabled: true },
+          },
+        }
+      : {}),
+    ...(llmBaseURL || llmHeaders
       ? {
           configuration: {
-            baseURL: llmBaseURL,
+            ...(llmBaseURL ? { baseURL: llmBaseURL } : {}),
+            ...(llmHeaders ? { defaultHeaders: llmHeaders } : {}),
           },
         }
       : {}),
diff --git a/compose.yaml b/compose.yaml
index f09b92e..a385ae1 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -16,9 +16,14 @@ services:
       DATABASE_URL: "file:../../.data/clientsflow-dev.db"
       REDIS_URL: "redis://redis:6379"
       CF_AGENT_MODE: "langgraph"
-      OPENAI_MODEL: "gpt-4o-mini"
+      OPENROUTER_API_KEY: "${OPENROUTER_API_KEY:-}"
+      OPENROUTER_BASE_URL: "https://openrouter.ai/api/v1"
+      OPENROUTER_MODEL: "openai/gpt-4o-mini"
+      OPENROUTER_HTTP_REFERER: "${OPENROUTER_HTTP_REFERER:-}"
+      OPENROUTER_X_TITLE: "clientsflow"
+      OPENROUTER_REASONING_ENABLED: "${OPENROUTER_REASONING_ENABLED:-0}"
       # Set this in your shell or a compose override:
-      # OPENAI_API_KEY: "..."
+      # OPENROUTER_API_KEY: "..."
       # GIGACHAT_AUTH_KEY: "..."  (if you use GigaChat integration)
     command: >
       bash -lc "