diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index 51a6aa9e..6c68d500 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -545,11 +545,14 @@ and native Anthropic Messages transports may receive them.
 Discord and Telegram messaging. Managed task invocations set
 `ANTHROPIC_API_URL`, `ANTHROPIC_BASE_URL`, gateway model discovery,
 non-interactive terminal settings, optional `--resume`, optional
-`--fork-session`, and `--output-format stream-json`. The managed session parser
-extracts persistent Claude session IDs and yields Claude stream-json events to
-the messaging event parser. Managed Claude also owns subprocess stderr
-diagnostic classification so known benign Claude Code notices do not become
-messaging task errors, while unknown stderr remains fatal.
+`--fork-session`, `--model opus`, and `--output-format stream-json`. Messaging
+pins this Claude tier alias so phone sessions route through `MODEL_OPUS` or the
+`MODEL` fallback instead of inheriting a user's interactive `/model` picker
+state. The managed session parser extracts persistent Claude session IDs and
+yields Claude stream-json events to the messaging event parser. Managed Claude
+also owns subprocess stderr diagnostic classification so known benign Claude
+Code notices do not become messaging task errors, while unknown stderr remains
+fatal.
 
 Codex is supported through `fcc-codex` and Codex extensions. FCC does not keep an
 internal managed-Codex session runner because no user-facing messaging setting
diff --git a/cli/managed/claude.py b/cli/managed/claude.py
index ae3b9cb1..74825d1c 100644
--- a/cli/managed/claude.py
+++ b/cli/managed/claude.py
@@ -13,6 +13,8 @@ from cli.claude_env import (
     claude_auth_token,
 )
 
+MANAGED_CLAUDE_MODEL_TIER = "opus"
+
 
 @dataclass(frozen=True, slots=True)
 class ManagedClaudeTaskRequest:
@@ -89,6 +91,7 @@ def build_managed_claude_invocation(
             "prompt": request.prompt,
             "cwd": config.workspace_path,
             "claude_binary": config.claude_bin,
+            "managed_model_tier": MANAGED_CLAUDE_MODEL_TIER,
             "cli_argv": cmd,
         },
     )
@@ -134,6 +137,8 @@ def build_managed_claude_command(
         if fork_session:
             cmd.append("--fork-session")
         cmd += [
+            "--model",
+            MANAGED_CLAUDE_MODEL_TIER,
             "-p",
             prompt,
             "--output-format",
@@ -144,6 +149,8 @@ def build_managed_claude_command(
     else:
         cmd = [
             claude_bin,
+            "--model",
+            MANAGED_CLAUDE_MODEL_TIER,
             "-p",
             prompt,
             "--output-format",
diff --git a/pyproject.toml b/pyproject.toml
index 829bceee..814efbb7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "free-claude-code"
-version = "3.4.9"
+version = "3.4.10"
 description = "Middleware between Claude Code CLI (Anthropic API) and NVIDIA NIM"
 readme = "README.md"
 requires-python = ">=3.14.0"
diff --git a/tests/cli/test_managed_claude.py b/tests/cli/test_managed_claude.py
index 4fccc4f7..bd2d855a 100644
--- a/tests/cli/test_managed_claude.py
+++ b/tests/cli/test_managed_claude.py
@@ -1,6 +1,7 @@
 import os
 
 from cli.managed.claude import (
+    MANAGED_CLAUDE_MODEL_TIER,
     ManagedClaudeConfig,
     ManagedClaudeParseState,
     ManagedClaudeTaskRequest,
@@ -51,7 +52,12 @@ def test_managed_claude_builds_new_task_command_and_env() -> None:
         base_env={"PATH": "keep", "ANTHROPIC_API_KEY": "official"},
     )
 
-    assert invocation.argv[:2] == ("claude", "-p")
+    assert invocation.argv[:4] == (
+        "claude",
+        "--model",
+        MANAGED_CLAUDE_MODEL_TIER,
+        "-p",
+    )
     assert "hello" in invocation.argv
     assert "--output-format" in invocation.argv
     assert "stream-json" in invocation.argv
@@ -65,6 +71,7 @@ def test_managed_claude_builds_new_task_command_and_env() -> None:
     assert "ANTHROPIC_API_KEY" not in invocation.env
     assert invocation.trace_metadata["client_cli_id"] == "claude"
     assert invocation.trace_metadata["claude_binary"] == "claude"
+    assert invocation.trace_metadata["managed_model_tier"] == MANAGED_CLAUDE_MODEL_TIER
 
 
 def test_managed_claude_builds_resume_and_fork_commands() -> None:
@@ -81,9 +88,24 @@ def test_managed_claude_builds_resume_and_fork_commands() -> None:
         base_env={},
     )
 
-    assert resume.argv[:3] == ("claude", "--resume", "sess_1")
+    assert resume.argv[:6] == (
+        "claude",
+        "--resume",
+        "sess_1",
+        "--model",
+        MANAGED_CLAUDE_MODEL_TIER,
+        "-p",
+    )
     assert "--fork-session" not in resume.argv
-    assert fork.argv[:3] == ("claude", "--resume", "sess_1")
+    assert fork.argv[:7] == (
+        "claude",
+        "--resume",
+        "sess_1",
+        "--fork-session",
+        "--model",
+        MANAGED_CLAUDE_MODEL_TIER,
+        "-p",
+    )
     assert "--fork-session" in fork.argv
 
 
diff --git a/tests/contracts/test_import_boundaries.py b/tests/contracts/test_import_boundaries.py
index 4f28c3f5..18e48e0e 100644
--- a/tests/contracts/test_import_boundaries.py
+++ b/tests/contracts/test_import_boundaries.py
@@ -608,6 +608,11 @@ def test_cli_surfaces_are_explicit_launchers_and_managed_claude() -> None:
     claude_env_text = (cli_root / "claude_env.py").read_text(encoding="utf-8")
     assert 'CLAUDE_CODE_AUTO_COMPACT_WINDOW = "190000"' in claude_env_text
     assert 'CLAUDE_NO_AUTH_SENTINEL = "fcc-no-auth"' in claude_env_text
+    managed_claude_text = (cli_root / "managed" / "claude.py").read_text(
+        encoding="utf-8"
+    )
+    assert 'MANAGED_CLAUDE_MODEL_TIER = "opus"' in managed_claude_text
+    assert '"managed_model_tier": MANAGED_CLAUDE_MODEL_TIER' in managed_claude_text
     for path in {
         cli_root / "launchers" / "claude.py",
         cli_root / "managed" / "claude.py",
diff --git a/uv.lock b/uv.lock
index adc31cef..6187f62b 100644
--- a/uv.lock
+++ b/uv.lock
@@ -561,7 +561,7 @@ wheels = [
 
 [[package]]
 name = "free-claude-code"
-version = "3.4.9"
+version = "3.4.10"
 source = { editable = "." }
 dependencies = [
     { name = "aiohttp" },