diff --git a/src/benchmarks/agent-cli/runner.ts b/src/benchmarks/agent-cli/runner.ts
index 1192513a..1fa6f624 100644
--- a/src/benchmarks/agent-cli/runner.ts
+++ b/src/benchmarks/agent-cli/runner.ts
@@ -13,6 +13,7 @@ import { isNone } from "effect/Option";
 
 import { SolverError } from "../../harness/core";
 import type { ModelUsage } from "../../harness/core";
+import { stripRoutingPrefix } from "../../harness/model-slug";
 import { definedValues } from "../../internal/guards";
 import { wLog } from "../../internal/log";
 import { recordGenerationId } from "../../runtime/generation-ids";
@@ -165,14 +166,7 @@ export interface AgentCliRunResult extends OriAgentRun {
   readonly failureDetail: string;
 }
 
-export function normalizeAgentModel(model: string): string {
-  const routingPrefix = "openrouter/";
-  if (!model.startsWith(routingPrefix)) {
-    return model;
-  }
-  const rest = model.slice(routingPrefix.length);
-  return rest.includes("/") ? rest : model;
-}
+export const normalizeAgentModel = stripRoutingPrefix;
 
 export function buildAgentCliEnv(opts: AgentCliOpts): Record<string, string> {
   const env: Record<string, string> = {
diff --git a/src/harness/model-slug.test.ts b/src/harness/model-slug.test.ts
new file mode 100644
index 00000000..540247a7
--- /dev/null
+++ b/src/harness/model-slug.test.ts
@@ -0,0 +1,16 @@
+import { describe, expect, it } from "bun:test";
+
+import { stripRoutingPrefix } from "./model-slug";
+
+describe("stripRoutingPrefix", () => {
+  it("removes the openrouter/ routing prefix from a full slug", () => {
+    expect(stripRoutingPrefix("openrouter/sakana/fugu-ultra")).toBe(
+      "sakana/fugu-ultra"
+    );
+  });
+
+  it("keeps openrouter-authored slugs and unprefixed slugs unchanged", () => {
+    expect(stripRoutingPrefix("openrouter/auto")).toBe("openrouter/auto");
+    expect(stripRoutingPrefix("sakana/fugu-ultra")).toBe("sakana/fugu-ultra");
+  });
+});
diff --git a/src/harness/model-slug.ts b/src/harness/model-slug.ts
new file mode 100644
index 00000000..587b3338
--- /dev/null
+++ b/src/harness/model-slug.ts
@@ -0,0 +1,9 @@
+const ROUTING_PREFIX = "openrouter/";
+
+export function stripRoutingPrefix(model: string): string {
+  if (!model.startsWith(ROUTING_PREFIX)) {
+    return model;
+  }
+  const rest = model.slice(ROUTING_PREFIX.length);
+  return rest.includes("/") ? rest : model;
+}
diff --git a/src/sandbox/modal-regions.test.ts b/src/sandbox/modal-regions.test.ts
index 3e271e35..d0332560 100644
--- a/src/sandbox/modal-regions.test.ts
+++ b/src/sandbox/modal-regions.test.ts
@@ -11,6 +11,12 @@ describe("resolveModalRegions", () => {
     expect(resolveModalRegions("sakana/fugu-max", undefined)).toEqual(["us"]);
   });
 
+  it("matches pins through the openrouter/ routing prefix", () => {
+    expect(
+      resolveModalRegions("openrouter/sakana/fugu-ultra", undefined)
+    ).toEqual(["us"]);
+  });
+
   it("leaves unpinned models to Modal's default placement", () => {
     expect(
       resolveModalRegions("anthropic/claude-opus-5", undefined)
diff --git a/src/sandbox/modal-regions.ts b/src/sandbox/modal-regions.ts
index 31757de4..9d559615 100644
--- a/src/sandbox/modal-regions.ts
+++ b/src/sandbox/modal-regions.ts
@@ -1,3 +1,5 @@
+import { stripRoutingPrefix } from "../harness/model-slug";
+
 export const MODAL_US_REGIONS = ["us"] as const;
 
 export interface ModalRegionPin {
@@ -17,5 +19,6 @@ export function resolveModalRegions(
   if (configured !== undefined) {
     return configured;
   }
-  return pins.find((pin) => model.startsWith(pin.modelPrefix))?.regions;
+  const slug = stripRoutingPrefix(model);
+  return pins.find((pin) => slug.startsWith(pin.modelPrefix))?.regions;
 }