diff --git a/packages/opencode/src/provider/models.ts b/packages/opencode/src/provider/models.ts
index c58638d28..98e245fa8 100644
--- a/packages/opencode/src/provider/models.ts
+++ b/packages/opencode/src/provider/models.ts
@@ -92,6 +92,7 @@ export namespace ModelsDev {
     const result = await fetch("https://models.dev/api.json", {
       headers: {
         "User-Agent": Installation.USER_AGENT,
+        "x-opencode-client": Flag.OPENCODE_CLIENT,
       },
       signal: AbortSignal.timeout(10 * 1000),
     }).catch((e) => {