diff --git a/src/sse/services/model.js b/src/sse/services/model.js
index ba4cc6c24a..a5a077e991 100644
--- a/src/sse/services/model.js
+++ b/src/sse/services/model.js
@@ -1,7 +1,6 @@
 // Re-export from open-sse with localDb integration
 import { getModelAliases, getComboByName, getProviderNodes } from "@/lib/localDb";
 import { parseModel as parseModelCore, resolveModelAliasFromMap, getModelInfoCore } from "open-sse/services/model.js";
-import REGISTRY from "open-sse/providers/registry/index.js";
 
 // Local provider alias overrides (HMR-friendly, applied on top of open-sse map)
 const LOCAL_PROVIDER_ALIASES = {
@@ -9,13 +8,6 @@ const LOCAL_PROVIDER_ALIASES = {
   "xiaomi-tokenplan": "xiaomi-tokenplan",
 };
 
-const RESERVED_PROVIDER_PREFIXES = new Set(Object.keys(LOCAL_PROVIDER_ALIASES));
-for (const entry of REGISTRY) {
-  RESERVED_PROVIDER_PREFIXES.add(entry.id);
-  if (entry.alias) RESERVED_PROVIDER_PREFIXES.add(entry.alias);
-  for (const alias of entry.aliases || []) RESERVED_PROVIDER_PREFIXES.add(alias);
-}
-
 export function parseModel(modelStr) {
   const parsed = parseModelCore(modelStr);
   if (parsed?.providerAlias && LOCAL_PROVIDER_ALIASES[parsed.providerAlias]) {
@@ -39,27 +31,31 @@ export async function getModelInfo(modelStr) {
   const parsed = parseModel(modelStr);
 
   if (!parsed.isAlias) {
-    // Provider-node prefixes are user-defined. They must not override built-in
-    // provider ids/aliases such as `cf`, `cloudflare-ai`, `openai`, or `hf`.
-    if (!RESERVED_PROVIDER_PREFIXES.has(parsed.providerAlias)) {
-      const openaiNodes = await getProviderNodes({ type: "openai-compatible" });
-      const matchedOpenAI = openaiNodes.find((node) => node.prefix === parsed.providerAlias);
-      if (matchedOpenAI) {
-        return { provider: matchedOpenAI.id, model: parsed.model };
-      }
+    // Provider-node prefixes are user-defined. Check custom nodes first — if the
+    // user explicitly created a node with a given prefix, route to it even when
+    // the prefix collides with a built-in provider id/alias (e.g. a custom
+    // "tokenrouter" node with prefix "tr"). The user's credentials are stored
+    // under the node ID; routing to the built-in provider instead would fail
+    // with "No credentials for provider". When no custom node matches, fall
+    // through to the built-in provider resolution below.
+    const openaiNodes = await getProviderNodes({ type: "openai-compatible" });
+    const matchedOpenAI = openaiNodes.find((node) => node.prefix === parsed.providerAlias);
+    if (matchedOpenAI) {
+      return { provider: matchedOpenAI.id, model: parsed.model };
+    }
 
-      const anthropicNodes = await getProviderNodes({ type: "anthropic-compatible" });
-      const matchedAnthropic = anthropicNodes.find((node) => node.prefix === parsed.providerAlias);
-      if (matchedAnthropic) {
-        return { provider: matchedAnthropic.id, model: parsed.model };
-      }
+    const anthropicNodes = await getProviderNodes({ type: "anthropic-compatible" });
+    const matchedAnthropic = anthropicNodes.find((node) => node.prefix === parsed.providerAlias);
+    if (matchedAnthropic) {
+      return { provider: matchedAnthropic.id, model: parsed.model };
+    }
 
-      const embeddingNodes = await getProviderNodes({ type: "custom-embedding" });
-      const matchedEmbedding = embeddingNodes.find((node) => node.prefix === parsed.providerAlias);
-      if (matchedEmbedding) {
-        return { provider: matchedEmbedding.id, model: parsed.model };
-      }
+    const embeddingNodes = await getProviderNodes({ type: "custom-embedding" });
+    const matchedEmbedding = embeddingNodes.find((node) => node.prefix === parsed.providerAlias);
+    if (matchedEmbedding) {
+      return { provider: matchedEmbedding.id, model: parsed.model };
     }
+
     return {
       provider: parsed.provider,
       model: parsed.model
diff --git a/tests/unit/model-routing.test.js b/tests/unit/model-routing.test.js
index 827e1319d9..9674906136 100644
--- a/tests/unit/model-routing.test.js
+++ b/tests/unit/model-routing.test.js
@@ -38,10 +38,13 @@ describe("model routing", () => {
     else process.env.DATA_DIR = originalDataDir;
   });
 
-  it("keeps built-in provider aliases ahead of compatible node prefixes", async () => {
+  it("routes to custom node when its prefix collides with a built-in provider alias", async () => {
     const ctx = await setupDb();
     cleanup = ctx.cleanup;
 
+    // User explicitly creates a custom node with prefix "cf" (cloudflare-ai alias).
+    // Credentials are stored under the node ID, so routing must go to the node,
+    // not the built-in provider (which would have no credentials).
     await ctx.createProviderNode({
       id: "openai-compatible-chat-test",
       type: "openai-compatible",
@@ -53,11 +56,36 @@ describe("model routing", () => {
 
     await expect(ctx.getModelInfo("cf/@cf/black-forest-labs/flux-2-klein-9b"))
       .resolves.toEqual({
-        provider: "cloudflare-ai",
+        provider: "openai-compatible-chat-test",
         model: "@cf/black-forest-labs/flux-2-klein-9b",
       });
   });
 
+  it("routes to custom node when prefix matches built-in tokenrouter alias (tr)", async () => {
+    const ctx = await setupDb();
+    cleanup = ctx.cleanup;
+
+    // Reproduces: user creates a custom openai-compatible node named "tokenrouter"
+    // with prefix "tr". The built-in provider "tokenrouter" also has alias "tr".
+    // Previously, the reserved-prefix guard skipped the custom node lookup and
+    // routed to the built-in provider, which had no credentials →
+    // "No active credentials for provider: tokenrouter".
+    await ctx.createProviderNode({
+      id: "openai-compatible-chat-tr-node",
+      type: "openai-compatible",
+      name: "tokenrouter",
+      prefix: "tr",
+      apiType: "chat",
+      baseUrl: "https://api.tokenrouter.com/v1",
+    });
+
+    await expect(ctx.getModelInfo("tr/qwen/qwen3.8-max-free"))
+      .resolves.toEqual({
+        provider: "openai-compatible-chat-tr-node",
+        model: "qwen/qwen3.8-max-free",
+      });
+  });
+
   it("still routes non-reserved compatible node prefixes", async () => {
     const ctx = await setupDb();
     cleanup = ctx.cleanup;