chore(models): move the opus alias to claude-opus-5

Claude Opus 5 released today — same $5/$25 sticker, 1M context; Opus 4.8
moves to legacy. The pricing table gains a dedicated claude-opus-5
fragment (the claude-opus-4 substring doesn't cover it, so without the
row the fleet's Opus usage would silently cost-track as $0 — exactly
what test_opus_is_priced now guards).

tests/unit/billing/test_pricing.py

@@ -565,6 +565,7 @@ class TestProviderAwareness:
         for name in (
             "claude-opus-4-6",
             "claude-opus-4-8",
+            "claude-opus-5",
             "claude-fable-5",
             "opus",
             "sonnet",

tests/unit/models/test_misc_models.py

@@ -106,7 +106,7 @@ def test_build_anthropic_entries_skips_missing_models() -> None:
     # Patch MODEL_MAP to be missing one entry → loop hits the `continue` branch.
     with patch(
         "roboco.models.llm_catalog.MODEL_MAP",
-        {"opus": "claude-opus-4-8"},  # sonnet+haiku missing
+        {"opus": "claude-opus-5"},  # sonnet+haiku missing
     ):
         entries = _build_anthropic_entries()
     # Only one entry survives — opus.

tests/unit/models/test_model_map.py

@@ -12,10 +12,9 @@ def test_sonnet_alias_resolves_to_sonnet_5() -> None:
     assert MODEL_MAP["sonnet"] == "claude-sonnet-5"
 
 
-def test_opus_alias_resolves_to_opus_4_8() -> None:
-    # CEO upgrade to the newest Opus tier ("Opus 5" does not exist — the
-    # Claude 5 family is Fable/Mythos/Sonnet; Opus tops out at 4.8).
-    assert MODEL_MAP["opus"] == "claude-opus-4-8"
+def test_opus_alias_resolves_to_opus_5() -> None:
+    # CEO upgrade to the newest Opus tier (Opus 5, released 2026-07-25).
+    assert MODEL_MAP["opus"] == "claude-opus-5"
 
 
 def test_sonnet_5_is_priced() -> None:

tests/unit/runtime/test_intake_spawn.py

@@ -56,7 +56,7 @@ def _spec(**overrides: Any) -> _IntakeRunSpec:
         },
         "session_id": "sess-abc",
         "cwd": "/data/workspaces/roboco/board/intake-1",
-        "cli_model": "claude-opus-4-8",
+        "cli_model": "claude-opus-5",
         "api_url": "http://roboco-orchestrator:8000",
         "provider_base_url": None,
         "provider_auth_token": None,
@@ -108,7 +108,7 @@ class TestBuildIntakeRunCmd:
         assert "ROBOCO_WORKSPACE=/data/workspaces/roboco/board/intake-1" in cmd
         assert "ROBOCO_API_URL=http://roboco-orchestrator:8000" in cmd
         assert "ROBOCO_AGENT_ID=intake-1" in cmd
-        assert "CLAUDE_CODE_SUBAGENT_MODEL=claude-opus-4-8" in cmd
+        assert "CLAUDE_CODE_SUBAGENT_MODEL=claude-opus-5" in cmd
 
     def test_mounts_prompt_and_workspaces(self) -> None:
         cmd = AgentOrchestrator._build_intake_run_cmd(_spec())

tests/unit/runtime/test_orchestrator_manifest.py

@@ -99,7 +99,7 @@ class TestBuildManifestForAgent:
             mock_settings.manifest_host_dir = str(tmp_path)
             mock_settings.workspaces_root = str(tmp_path / "workspaces")
 
-            result = _build_manifest_for_agent("be-dev-1", "claude-opus-4-8")
+            result = _build_manifest_for_agent("be-dev-1", "claude-opus-5")
 
         assert result is not None
         data = json.loads(result.read_text())

tests/unit/runtime/test_spawn_manifest.py

@@ -87,7 +87,7 @@ class TestBuildForRole:
                 role=role,
                 team="board",
                 workspace_path=Path("/tmp/x"),
-                agent_model="claude-opus-4-8",
+                agent_model="claude-opus-5",
             )
         )
         assert "read_messages" in m.do_tools

tests/unit/services/test_audit_agent_id.py

@@ -182,7 +182,7 @@ async def test_log_agent_event_resolves_slug_to_uuid(
         event_type="agent.spawned",
         agent_slug=slug,
         task_id=task_id,
-        details={"container_id": "abc123def456", "model": "claude-opus-4-8"},
+        details={"container_id": "abc123def456", "model": "claude-opus-5"},
     )
 
     # Read back the row.

tests/unit/services/test_usage.py

@@ -945,7 +945,7 @@ class TestGetRecentSessions:
         row = MagicMock()
         row.id = sid
         row.agent_slug = "product-owner"
-        row.model = "claude-opus-4-8"
+        row.model = "claude-opus-5"
         row.started_at = datetime.datetime(2026, 6, 11, 20, 41, tzinfo=datetime.UTC)
         row.ended_at = datetime.datetime(2026, 6, 11, 20, 42, tzinfo=datetime.UTC)
         row.tokens_input = exp_in
@@ -966,7 +966,7 @@ class TestGetRecentSessions:
         s = out[0]
         assert s["id"] == str(sid)
         assert s["agent_slug"] == "product-owner"
-        assert s["model"] == "claude-opus-4-8"
+        assert s["model"] == "claude-opus-5"
         assert s["tokens_input"] == exp_in
         assert s["tokens_output"] == exp_out
         assert s["tokens_cache"] == exp_cr + exp_cw