diff --git a/README.md b/README.md
index 17fcd5f..bf8128d 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ luv --clean
 1. Clones the repo into `~/prs/{repo}-{number}/`
 2. Creates a new branch `luv-{number}`
 3. Configures the selected agent with the workspace's PR conventions
-4. Launches Claude with Opus 4.8 at max effort, or Codex in YOLO mode
+4. Launches Claude with Opus 5 at max effort, or Codex in YOLO mode
 
 All workspaces live under `~/prs/`. The number comes from the repo's GitHub issue counter to avoid collisions.
 
@@ -87,7 +87,7 @@ All workspaces live under `~/prs/`. The number comes from the repo's GitHub issu
 | `-r` | Resume: resume the selected agent's last session |
 | `-p` | Launch Claude in plan permission mode (default: `bypassPermissions`) |
 | `-nit` | Non-interactive: run the selected agent and exit (no REPL); Claude streams `stream-json` events to stdout |
-| `-m MODEL` | Model to use; Claude defaults to `claude-opus-4-8`, while Codex uses its configured CLI default |
+| `-m MODEL` | Model to use; Claude defaults to `claude-opus-5`, while Codex uses its configured CLI default |
 | `-b BRANCH` | Base a new workspace off `BRANCH` (clone + branch from it); recorded in `git config luv.base` so the PR can target it |
 | `-e` | Env: pass `LUV_*` environment variables (with prefix stripped) into the session |
 | `-f`, `--force` | Skip safety checks (with `--clean`) |
diff --git a/luv/__init__.py b/luv/__init__.py
index 79e43d5..7c0808f 100644
--- a/luv/__init__.py
+++ b/luv/__init__.py
@@ -331,7 +331,7 @@ def resume(clone_dir: Path, extra_env: dict[str, str] | None = None,
 
     if agent == "claude":
         agent_cmd = ["claude", "--dangerously-skip-permissions",
-                     "--model", model or "claude-opus-4-8",
+                     "--model", model or "claude-opus-5",
                      "--effort", "max", "--resume",
                      "--remote-control",
                      "--remote-control-session-name-prefix", clone_dir.name]
@@ -386,7 +386,7 @@ def launch(clone_dir: Path, prompt: str | None, plan_mode: bool = False,
             agent_cmd.append(prompt)
     else:
         common_flags = ["--dangerously-skip-permissions",
-                    "--model", model or "claude-opus-4-8",
+                    "--model", model or "claude-opus-5",
                     "--effort", "max",
                     "--remote-control",
                     "--remote-control-session-name-prefix", clone_dir.name]
@@ -721,7 +721,7 @@ def main() -> None:
   -r            resume: resume the selected agent's last session
   -p            launch Claude in plan permission mode (default: bypassPermissions)
   -nit          non-interactive: run the selected agent and exit (no REPL)
-  -m MODEL      model to use (Claude default: claude-opus-4-8; Codex: CLI default)
+  -m MODEL      model to use (Claude default: claude-opus-5; Codex: CLI default)
   -b BRANCH     base a new workspace off BRANCH (clone + branch from it; recorded in git config luv.base)
   -e            env: pass LUV_* environment variables (with prefix stripped) into the session
   -f, --force   (with --clean) skip safety checks and delete all work folders
diff --git a/tests/test_agents.py b/tests/test_agents.py
index 10239e6..82e226d 100644
--- a/tests/test_agents.py
+++ b/tests/test_agents.py
@@ -59,7 +59,7 @@ def test_claude_remains_default(self):
         _, argv = self._exec_args(luv.launch, self.clone_dir, None)
 
         self.assertEqual(argv[0], "/bin/claude")
-        self.assertIn("claude-opus-4-8", argv)
+        self.assertIn("claude-opus-5", argv)
         self.assertIn("--dangerously-skip-permissions", argv)
 
     def test_main_routes_codex_to_existing_workspace(self):