diff --git a/package-lock.json b/package-lock.json
index 2243663..5fe6b4f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@companion-ai/feynman",
-  "version": "0.2.13",
+  "version": "0.2.14",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@companion-ai/feynman",
-      "version": "0.2.13",
+      "version": "0.2.14",
       "license": "MIT",
       "dependencies": {
         "@companion-ai/alpha-hub": "^0.1.2",
diff --git a/package.json b/package.json
index 585c629..74a2c29 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@companion-ai/feynman",
-  "version": "0.2.13",
+  "version": "0.2.14",
   "description": "Research-first CLI agent built on Pi and alphaXiv",
   "license": "MIT",
   "type": "module",
diff --git a/src/model/commands.ts b/src/model/commands.ts
index b43b132..b0b7629 100644
--- a/src/model/commands.ts
+++ b/src/model/commands.ts
@@ -3,6 +3,7 @@ import { writeFileSync } from "node:fs";
 
 import { readJson } from "../pi/settings.js";
 import { promptChoice, promptText } from "../setup/prompts.js";
+import { openUrl } from "../system/open-url.js";
 import { printInfo, printSection, printSuccess, printWarning } from "../ui/terminal.js";
 import {
 	buildModelStatusSnapshotFromRecords,
@@ -126,7 +127,13 @@ export async function loginModelProvider(authPath: string, providerId?: string,
 	await authStorage.login(provider.id, {
 		onAuth: (info: { url: string; instructions?: string }) => {
 			printSection(`Login: ${provider.name ?? provider.id}`);
-			printInfo(`Open this URL: ${info.url}`);
+			const opened = openUrl(info.url);
+			if (opened) {
+				printInfo("Opened the login URL in your browser.");
+			} else {
+				printWarning("Couldn't open your browser automatically.");
+			}
+			printInfo(`Auth URL: ${info.url}`);
 			if (info.instructions) {
 				printInfo(info.instructions);
 			}
diff --git a/src/system/open-url.ts b/src/system/open-url.ts
new file mode 100644
index 0000000..49ff854
--- /dev/null
+++ b/src/system/open-url.ts
@@ -0,0 +1,51 @@
+import { spawn } from "node:child_process";
+
+import { resolveExecutable } from "./executables.js";
+
+type ResolveExecutableFn = (name: string, fallbackPaths?: string[]) => string | undefined;
+
+type OpenUrlCommand = {
+	command: string;
+	args: string[];
+};
+
+export function getOpenUrlCommand(
+	url: string,
+	platform = process.platform,
+	resolveCommand: ResolveExecutableFn = resolveExecutable,
+): OpenUrlCommand | undefined {
+	if (platform === "win32") {
+		return {
+			command: "cmd",
+			args: ["/c", "start", "", url],
+		};
+	}
+
+	if (platform === "darwin") {
+		const command = resolveCommand("open");
+		return command ? { command, args: [url] } : undefined;
+	}
+
+	const command = resolveCommand("xdg-open");
+	return command ? { command, args: [url] } : undefined;
+}
+
+export function openUrl(url: string): boolean {
+	const command = getOpenUrlCommand(url);
+	if (!command) {
+		return false;
+	}
+
+	try {
+		const child = spawn(command.command, command.args, {
+			detached: true,
+			stdio: "ignore",
+			windowsHide: true,
+		});
+		child.on("error", () => {});
+		child.unref();
+		return true;
+	} catch {
+		return false;
+	}
+}
diff --git a/tests/open-url.test.ts b/tests/open-url.test.ts
new file mode 100644
index 0000000..3f07916
--- /dev/null
+++ b/tests/open-url.test.ts
@@ -0,0 +1,45 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import { getOpenUrlCommand } from "../src/system/open-url.js";
+
+test("getOpenUrlCommand uses open on macOS when available", () => {
+	const command = getOpenUrlCommand(
+		"https://example.com",
+		"darwin",
+		(name) => (name === "open" ? "/usr/bin/open" : undefined),
+	);
+
+	assert.deepEqual(command, {
+		command: "/usr/bin/open",
+		args: ["https://example.com"],
+	});
+});
+
+test("getOpenUrlCommand uses xdg-open on Linux when available", () => {
+	const command = getOpenUrlCommand(
+		"https://example.com",
+		"linux",
+		(name) => (name === "xdg-open" ? "/usr/bin/xdg-open" : undefined),
+	);
+
+	assert.deepEqual(command, {
+		command: "/usr/bin/xdg-open",
+		args: ["https://example.com"],
+	});
+});
+
+test("getOpenUrlCommand uses cmd start on Windows", () => {
+	const command = getOpenUrlCommand("https://example.com", "win32");
+
+	assert.deepEqual(command, {
+		command: "cmd",
+		args: ["/c", "start", "", "https://example.com"],
+	});
+});
+
+test("getOpenUrlCommand returns undefined when no opener is available", () => {
+	const command = getOpenUrlCommand("https://example.com", "linux", () => undefined);
+
+	assert.equal(command, undefined);
+});
diff --git a/website/src/content/docs/getting-started/installation.md b/website/src/content/docs/getting-started/installation.md
index 0ec650c..017b9be 100644
--- a/website/src/content/docs/getting-started/installation.md
+++ b/website/src/content/docs/getting-started/installation.md
@@ -41,7 +41,7 @@ On Windows:
 & ([scriptblock]::Create((irm https://feynman.is/install.ps1))) -Version stable
 ```
 
-You can also pin an exact version by replacing `stable` with a version such as `0.2.13`.
+You can also pin an exact version by replacing `stable` with a version such as `0.2.14`.
 
 ## pnpm