diff --git a/packages/opencode/src/cli/cmd/web.ts b/packages/opencode/src/cli/cmd/web.ts
index 69a981aada49..990b7ca88136 100644
--- a/packages/opencode/src/cli/cmd/web.ts
+++ b/packages/opencode/src/cli/cmd/web.ts
@@ -30,7 +30,10 @@ function getNetworkIPs() {
 
 export const WebCommand = effectCmd({
   command: "web",
-  builder: (yargs) => withNetworkOptions(yargs),
+  builder: (yargs) => 
+    withNetworkOptions(yargs)
+      .boolean('no-open')
+      .describe('no-open', 'Do not automatically open the web interface in a browser'),
   describe: "start opencode server and open web interface",
   // Server loads instances per-request via x-opencode-directory header — no
   // ambient project InstanceContext needed at startup.
@@ -71,12 +74,17 @@ export const WebCommand = effectCmd({
         )
       }
 
-      // Open localhost in browser
-      open(localhostUrl).catch(() => {})
+      // Open localhost in browser unless --no-open is set
+      if (!args['no-open']) {
+        open(localhostUrl).catch(() => {})
+      }
     } else {
       const displayUrl = server.url.toString()
       UI.println(UI.Style.TEXT_INFO_BOLD + "  Web interface:    ", UI.Style.TEXT_NORMAL, displayUrl)
-      open(displayUrl).catch(() => {})
+      // Open display URL in browser unless --no-open is set
+      if (!args['no-open']) {
+        open(displayUrl).catch(() => {})
+      }
     }
 
     yield* Effect.never