From 41365cb3bc22b7feb0cafd9a0558e1426b7d08a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20M=C3=BCller?= <info@maximilianmueller.tech>
Date: Tue, 31 Mar 2026 16:42:32 +0200
Subject: [PATCH 1/2] Refactor model constants in server.ts for improved
 configurability in custom LLM gateway deployments using PERPLEXITY_BASE_URL

---
 src/server.ts | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/server.ts b/src/server.ts
index d649ccb..8a8eac5 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -13,6 +13,11 @@ import { ChatCompletionResponseSchema, SearchResponseSchema } from "./validation
 
 const PERPLEXITY_API_KEY = process.env.PERPLEXITY_API_KEY;
 const PERPLEXITY_BASE_URL = process.env.PERPLEXITY_BASE_URL || "https://api.perplexity.ai";
+
+const SONAR_PRO_MODEL = process.env.SONAR_PRO_MODEL || "sonar-pro";
+const SONAR_REASONING_MODEL = process.env.SONAR_REASONING_MODEL || "sonar-reasoning-pro";
+const SONAR_DEEP_RESEARCH_MODEL = process.env.SONAR_DEEP_RESEARCH_MODEL || "sonar-deep-research";
+
 const VERSION = "0.9.0";
 
 export function getProxyUrl(): string | undefined {
@@ -98,7 +103,7 @@ async function makeApiRequest(
     clearTimeout(timeoutId);
     if (error instanceof Error && error.name === "AbortError") {
       throw new Error(`Request timeout: Perplexity API did not respond within ${TIMEOUT_MS}ms. Consider increasing PERPLEXITY_TIMEOUT_MS.`);
-    }
+      }
     throw new Error(`Network error while calling Perplexity API: ${error}`);
   }
   clearTimeout(timeoutId);
@@ -191,12 +196,12 @@ export async function consumeSSEStream(response: Response): Promise<ChatCompleti
 
 export async function performChatCompletion(
   messages: Message[],
-  model: string = "sonar-pro",
+  model: string = SONAR_PRO_MODEL,
   stripThinking: boolean = false,
   serviceOrigin?: string,
   options?: ChatCompletionOptions
 ): Promise<string> {
-  const useStreaming = model === "sonar-deep-research";
+  const useStreaming = model === SONAR_DEEP_RESEARCH_MODEL;
 
   const body: Record<string, unknown> = {
     model: model,
@@ -393,7 +398,7 @@ export function createPerplexityServer(serviceOrigin?: string) {
         ...(search_domain_filter && { search_domain_filter }),
         ...(search_context_size && { search_context_size }),
       };
-      const result = await performChatCompletion(messages, "sonar-pro", false, serviceOrigin, Object.keys(options).length > 0 ? options : undefined);
+      const result = await performChatCompletion(messages, SONAR_PRO_MODEL, false, serviceOrigin, Object.keys(options).length > 0 ? options : undefined);
       return {
         content: [{ type: "text" as const, text: result }],
         structuredContent: { response: result },
@@ -431,7 +436,7 @@ export function createPerplexityServer(serviceOrigin?: string) {
       const options = {
         ...(reasoning_effort && { reasoning_effort }),
       };
-      const result = await performChatCompletion(messages, "sonar-deep-research", stripThinking, serviceOrigin, Object.keys(options).length > 0 ? options : undefined);
+      const result = await performChatCompletion(messages, SONAR_DEEP_RESEARCH_MODEL, stripThinking, serviceOrigin, Object.keys(options).length > 0 ? options : undefined);
       return {
         content: [{ type: "text" as const, text: result }],
         structuredContent: { response: result },
@@ -473,7 +478,7 @@ export function createPerplexityServer(serviceOrigin?: string) {
         ...(search_domain_filter && { search_domain_filter }),
         ...(search_context_size && { search_context_size }),
       };
-      const result = await performChatCompletion(messages, "sonar-reasoning-pro", stripThinking, serviceOrigin, Object.keys(options).length > 0 ? options : undefined);
+      const result = await performChatCompletion(messages, SONAR_REASONING_MODEL, stripThinking, serviceOrigin, Object.keys(options).length > 0 ? options : undefined);
       return {
         content: [{ type: "text" as const, text: result }],
         structuredContent: { response: result },

From 2928bc86ce1492c10a0c2988f4777a814869ce9d Mon Sep 17 00:00:00 2001
From: maximilianmueller-tchibo <maximilian.mueller@tchibo.de>
Date: Tue, 31 Mar 2026 17:05:30 +0200
Subject: [PATCH 2/2] Update server.ts

---
 src/server.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/server.ts b/src/server.ts
index 8a8eac5..534d6e4 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -103,7 +103,7 @@ async function makeApiRequest(
     clearTimeout(timeoutId);
     if (error instanceof Error && error.name === "AbortError") {
       throw new Error(`Request timeout: Perplexity API did not respond within ${TIMEOUT_MS}ms. Consider increasing PERPLEXITY_TIMEOUT_MS.`);
-      }
+    }
     throw new Error(`Network error while calling Perplexity API: ${error}`);
   }
   clearTimeout(timeoutId);