diff --git a/README.md b/README.md
index 024353b4..270f85e0 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ from agent import ComputerAgent
 # ComputerAgent works with any computer initialized with the Computer SDK
 
 agent = ComputerAgent(
-    model="anthropic/claude-3-5-sonnet-20241022",
+    model="anthropic/claude-sonnet-4-5-20250929",
     tools=[computer],
     max_trajectory_budget=5.0
 )
diff --git a/blog/build-your-own-operator-on-macos-2.md b/blog/build-your-own-operator-on-macos-2.md
index 1caac809..7a42d9ae 100644
--- a/blog/build-your-own-operator-on-macos-2.md
+++ b/blog/build-your-own-operator-on-macos-2.md
@@ -268,7 +268,7 @@ from agent import ComputerAgent
 async def run_multi_task_workflow():
     async with Computer() as macos_computer:
         agent = ComputerAgent(
-            model="anthropic/claude-3-5-sonnet-20241022",
+            model="anthropic/claude-sonnet-4-5-20250929",
             tools=[macos_computer]
         )
 
diff --git a/docs/content/docs/agent-sdk/custom-computer-handlers.mdx b/docs/content/docs/agent-sdk/custom-computer-handlers.mdx
index c76a5d66..4559090e 100644
--- a/docs/content/docs/agent-sdk/custom-computer-handlers.mdx
+++ b/docs/content/docs/agent-sdk/custom-computer-handlers.mdx
@@ -34,7 +34,7 @@ You can then use this as a tool for your agent:
 from agent import ComputerAgent
 
 agent = ComputerAgent(
-    model="anthropic/claude-3-5-sonnet-20241022",
+    model="anthropic/claude-sonnet-4-5-20250929",
     tools=[custom_computer],
 )
 
@@ -122,7 +122,7 @@ class MyCustomComputer(AsyncComputerHandler):
 custom_computer = MyCustomComputer()
 
 agent = ComputerAgent(
-    model="anthropic/claude-3-5-sonnet-20241022",
+    model="anthropic/claude-sonnet-4-5-20250929",
     tools=[custom_computer],
 )
 
diff --git a/docs/content/docs/agent-sdk/custom-tools.mdx b/docs/content/docs/agent-sdk/custom-tools.mdx
index 00847cf6..7e47ebf9 100644
--- a/docs/content/docs/agent-sdk/custom-tools.mdx
+++ b/docs/content/docs/agent-sdk/custom-tools.mdx
@@ -16,7 +16,7 @@ def calculate(a: int, b: int) -> int:
 
 # Use with agent
 agent = ComputerAgent(
-    model="anthropic/claude-3-5-sonnet-20241022",
+    model="anthropic/claude-sonnet-4-5-20250929",
     tools=[computer, calculate]
 )
 ```
@@ -43,7 +43,7 @@ from computer import Computer
 
 computer = Computer(...)
 agent = ComputerAgent(
-    model="anthropic/claude-3-5-sonnet-20241022",
+    model="anthropic/claude-sonnet-4-5-20250929",
     tools=[computer, read_file],
 )
 ```
diff --git a/docs/content/docs/agent-sdk/telemetry.mdx b/docs/content/docs/agent-sdk/telemetry.mdx
index cba00cab..a045f351 100644
--- a/docs/content/docs/agent-sdk/telemetry.mdx
+++ b/docs/content/docs/agent-sdk/telemetry.mdx
@@ -65,16 +65,31 @@ computer = Computer(telemetry_enabled=False)
 
 ```python
 from agent import ComputerAgent
+import os
+
+# Basic telemetry - performance metrics only (opt-out, enabled by default)
+agent = ComputerAgent(
+    model="claude-sonnet-4-5-20250929",
+    telemetry_enabled=True  # Default is True
+)
+
+# Enable telemetry with full conversation trajectory logging (opt-in)
+agent = ComputerAgent(
+    model="claude-sonnet-4-5-20250929",
+    telemetry_enabled={
+        "log_trajectory": True  # Logs full conversation items
+    }
+)
 
 # Disable completely
 agent = ComputerAgent(
-    model="claude-3-5-sonnet-20241022",
+    model="claude-sonnet-4-5-20250929",
     telemetry_enabled=False
 )
 
 # Enable trajectory logging (opt-in)
 agent = ComputerAgent(
-    model="claude-3-5-sonnet-20241022",
+    model="claude-sonnet-4-5-20250929",
     telemetry_enabled={"log_trajectory": True}
 )
 ```
diff --git a/docs/content/docs/example-usecases/form-filling.mdx b/docs/content/docs/example-usecases/form-filling.mdx
index d9a61581..f60beaba 100644
--- a/docs/content/docs/example-usecases/form-filling.mdx
+++ b/docs/content/docs/example-usecases/form-filling.mdx
@@ -76,7 +76,7 @@ verbosity=logging.INFO,
 ) as computer:
 
             agent = ComputerAgent(
-                model="anthropic/claude-3-5-sonnet-20241022",
+                model="anthropic/claude-sonnet-4-5-20250929",
                 tools=[computer],
                 only_n_most_recent_images=3,
                 verbosity=logging.INFO,
@@ -189,7 +189,7 @@ verbosity=logging.INFO,
 ) as computer:
 
             agent = ComputerAgent(
-                model="anthropic/claude-3-5-sonnet-20241022",
+                model="anthropic/claude-sonnet-4-5-20250929",
                 tools=[computer],
                 only_n_most_recent_images=3,
                 verbosity=logging.INFO,
@@ -293,7 +293,7 @@ verbosity=logging.INFO,
 ) as computer:
 
             agent = ComputerAgent(
-                model="anthropic/claude-3-5-sonnet-20241022",
+                model="anthropic/claude-sonnet-4-5-20250929",
                 tools=[computer],
                 only_n_most_recent_images=3,
                 verbosity=logging.INFO,
@@ -400,7 +400,7 @@ verbosity=logging.INFO,
 ) as computer:
 
             agent = ComputerAgent(
-                model="anthropic/claude-3-5-sonnet-20241022",
+                model="anthropic/claude-sonnet-4-5-20250929",
                 tools=[computer],
                 only_n_most_recent_images=3,
                 verbosity=logging.INFO,
diff --git a/docs/content/docs/get-started/quickstart.mdx b/docs/content/docs/get-started/quickstart.mdx
index e5c2d166..3cfa71c2 100644
--- a/docs/content/docs/get-started/quickstart.mdx
+++ b/docs/content/docs/get-started/quickstart.mdx
@@ -303,7 +303,7 @@ Then, use the `ComputerAgent` object:
 from agent import ComputerAgent
 
 agent = ComputerAgent(
-    model="anthropic/claude-3-5-sonnet-20241022",
+    model="anthropic/claude-sonnet-4-5-20250929",
     tools=[computer],
     max_trajectory_budget=5.0
 )
diff --git a/examples/agent_examples.py b/examples/agent_examples.py
index 42fa5c7f..6a3772ff 100644
--- a/examples/agent_examples.py
+++ b/examples/agent_examples.py
@@ -45,7 +45,7 @@ async def run_agent_example():
             # model="anthropic/claude-opus-4-20250514",
             # model="anthropic/claude-sonnet-4-20250514",
             # model="anthropic/claude-3-7-sonnet-20250219",
-            # model="anthropic/claude-3-5-sonnet-20241022",
+            # model="anthropic/claude-sonnet-4-5-20250929",
             # == UI-TARS ==
             # model="huggingface-local/ByteDance-Seed/UI-TARS-1.5-7B",
             # model="mlx/mlx-community/UI-TARS-1.5-7B-6bit",
diff --git a/libs/python/agent/agent/cli.py b/libs/python/agent/agent/cli.py
index dcd4544b..10cb40f7 100644
--- a/libs/python/agent/agent/cli.py
+++ b/libs/python/agent/agent/cli.py
@@ -6,7 +6,7 @@ Usage:
 
 Examples:
     python -m agent.cli openai/computer-use-preview
-    python -m agent.cli anthropic/claude-3-5-sonnet-20241022
+    python -m agent.cli anthropic/claude-sonnet-4-5-20250929
     python -m agent.cli omniparser+anthropic/claude-3-5-sonnet-20241022
 """
 
@@ -232,7 +232,7 @@ async def main():
         epilog="""
 Examples:
   python -m agent.cli openai/computer-use-preview
-  python -m agent.cli anthropic/claude-3-5-sonnet-20241022
+  python -m agent.cli anthropic/claude-sonnet-4-5-20250929
   python -m agent.cli omniparser+anthropic/claude-3-5-sonnet-20241022
   python -m agent.cli huggingface-local/ByteDance-Seed/UI-TARS-1.5-7B
         """,
@@ -240,7 +240,7 @@ Examples:
 
     parser.add_argument(
         "model",
-        help="Model string (e.g., 'openai/computer-use-preview', 'anthropic/claude-3-5-sonnet-20241022')",
+        help="Model string (e.g., 'openai/computer-use-preview', 'anthropic/claude-sonnet-4-5-20250929')",
     )
 
     parser.add_argument(
diff --git a/notebooks/agent_nb.ipynb b/notebooks/agent_nb.ipynb
index 69959037..46ca6265 100644
--- a/notebooks/agent_nb.ipynb
+++ b/notebooks/agent_nb.ipynb
@@ -430,14 +430,7 @@
    "execution_count": null,
    "metadata": {},
    "outputs": [],
-   "source": [
-    "anthropic_agent = ComputerAgent(\n",
-    "    tools=[computer],\n",
-    "    model=\"anthropic/claude-3-5-sonnet-20241022\",\n",
-    "    trajectory_dir=str(Path(\"trajectories\")),\n",
-    "    verbosity=logging.INFO\n",
-    ")\n"
-   ]
+   "source": "anthropic_agent = ComputerAgent(\n    tools=[computer],\n    model=\"anthropic/claude-sonnet-4-5-20250929\",\n    trajectory_dir=str(Path(\"trajectories\")),\n    verbosity=logging.INFO\n)\n"
   },
   {
    "cell_type": "markdown",
diff --git a/notebooks/customizing_computeragent.ipynb b/notebooks/customizing_computeragent.ipynb
index 56f0beb9..82ef22b9 100644
--- a/notebooks/customizing_computeragent.ipynb
+++ b/notebooks/customizing_computeragent.ipynb
@@ -148,18 +148,7 @@
    "execution_count": null,
    "metadata": {},
    "outputs": [],
-   "source": [
-    "from agent.callbacks import ImageRetentionCallback, TrajectorySaverCallback\n",
-    "\n",
-    "agent_with_callbacks = ComputerAgent(\n",
-    "    model=\"anthropic/claude-3-5-sonnet-20241022\",\n",
-    "    tools=[computer],\n",
-    "    callbacks=[\n",
-    "        ImageRetentionCallback(only_n_most_recent_images=3),\n",
-    "        TrajectorySaverCallback(\"./trajectories\"),\n",
-    "    ],\n",
-    ")\n"
-   ]
+   "source": "from agent.callbacks import ImageRetentionCallback, TrajectorySaverCallback\n\nagent_with_callbacks = ComputerAgent(\n    model=\"anthropic/claude-sonnet-4-5-20250929\",\n    tools=[computer],\n    callbacks=[\n        ImageRetentionCallback(only_n_most_recent_images=3),\n        TrajectorySaverCallback(\"./trajectories\"),\n    ],\n)\n"
   },
   {
    "cell_type": "markdown",
@@ -198,4 +187,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 5
-}
+}
\ No newline at end of file