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Sweep 28 Aug 2026 ยท 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

One change

Sessions

api/beta/sessions

first seen The page's own history The capture it came from

Nearest release: v2.1.238, published under an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

api/beta/sessions Changed · +72 / -34 lines

This page is larger than the 256 KiB this site keeps, so one side of the diff below stops where the stored text does.

from line 19
 
   - `string`
 
-  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
+  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
 
     - `"message-batches-2024-09-24"`
 
from line 65
 
     - `"user-profiles-2026-03-24"`
 
+    - `"user-profiles-2026-08-18"`
+
     - `"advisor-tool-2026-03-01"`
 
     - `"managed-agents-2026-04-01"`
from line 143
 
     - `model: optional BetaManagedAgentsModel or BetaManagedAgentsModelConfigParams`
 
-      Replacement model. Accepts the model string, e.g. `claude-opus-4-6`, or a `model_config` object. Omit to use the agent's model.
+      Replacement model. Accepts the model string, e.g. `claude-opus-5`, or a `model_config` object. Omit to use the agent's model.
 
       - `BetaManagedAgentsModel = "claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more or string`
 
from line 1522
       }
     ],
     "model": {
-      "id": "claude-sonnet-4-6",
+      "id": "claude-opus-5",
       "effort": {
         "type": "low"
       },
from line 1542
             }
           ],
           "model": {
-            "id": "claude-sonnet-4-6",
+            "id": "claude-opus-5",
             "effort": {
               "type": "low"
             },
from line 1778
 
   - `string`
 
-  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
+  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
 
     - `"message-batches-2024-09-24"`
 
from line 1824
 
     - `"user-profiles-2026-03-24"`
 
+    - `"user-profiles-2026-08-18"`
+
     - `"advisor-tool-2026-03-01"`
 
     - `"managed-agents-2026-04-01"`
from line 2539
           }
         ],
         "model": {
-          "id": "claude-sonnet-4-6",
+          "id": "claude-opus-5",
           "effort": {
             "type": "low"
           },
from line 2559
                 }
               ],
               "model": {
-                "id": "claude-sonnet-4-6",
+                "id": "claude-opus-5",
                 "effort": {
                   "type": "low"
                 },
from line 2737
 
   - `string`
 
-  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
+  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
 
     - `"message-batches-2024-09-24"`
 
from line 2783
 
     - `"user-profiles-2026-03-24"`
 
+    - `"user-profiles-2026-08-18"`
+
     - `"advisor-tool-2026-03-01"`
 
     - `"managed-agents-2026-04-01"`
from line 3488
       }
     ],
     "model": {
-      "id": "claude-sonnet-4-6",
+      "id": "claude-opus-5",
       "effort": {
         "type": "low"
       },
from line 3508
             }
           ],
           "model": {
-            "id": "claude-sonnet-4-6",
+            "id": "claude-opus-5",
             "effort": {
               "type": "low"
             },
from line 3682
 
   - `string`
 
-  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
+  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
 
     - `"message-batches-2024-09-24"`
 
from line 3728
 
     - `"user-profiles-2026-03-24"`
 
+    - `"user-profiles-2026-08-18"`
+
     - `"advisor-tool-2026-03-01"`
 
     - `"managed-agents-2026-04-01"`
from line 4657
       }
     ],
     "model": {
-      "id": "claude-sonnet-4-6",
+      "id": "claude-opus-5",
       "effort": {
         "type": "low"
       },
from line 4677
             }
           ],
           "model": {
-            "id": "claude-sonnet-4-6",
+            "id": "claude-opus-5",
             "effort": {
               "type": "low"
             },
from line 4851
 
   - `string`
 
-  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
+  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
 
     - `"message-batches-2024-09-24"`
 
from line 4897
 
     - `"user-profiles-2026-03-24"`
 
+    - `"user-profiles-2026-08-18"`
+
     - `"advisor-tool-2026-03-01"`
 
     - `"managed-agents-2026-04-01"`
from line 4970
 
   - `string`
 
-  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
+  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
 
     - `"message-batches-2024-09-24"`
 
from line 5016
 
     - `"user-profiles-2026-03-24"`
 
+    - `"user-profiles-2026-08-18"`
+
     - `"advisor-tool-2026-03-01"`
 
     - `"managed-agents-2026-04-01"`
from line 5722
       }
     ],
     "model": {
-      "id": "claude-sonnet-4-6",
+      "id": "claude-opus-5",
       "effort": {
         "type": "low"
       },
from line 5742
             }
           ],
           "model": {
-            "id": "claude-sonnet-4-6",
+            "id": "claude-opus-5",
             "effort": {
               "type": "low"
             },
from line 5988
 
   - `model: optional BetaManagedAgentsModel or BetaManagedAgentsModelConfigParams`
 
-    Replacement model. Accepts the model string, e.g. `claude-opus-4-6`, or a `model_config` object. Omit to use the agent's model.
+    Replacement model. Accepts the model string, e.g. `claude-opus-5`, or a `model_config` object. Omit to use the agent's model.
 
     - `BetaManagedAgentsModel = "claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more or string`
 
from line 9316
 
   - `string`
 
-  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 30 more`
+  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more`
 
     - `"message-batches-2024-09-24"`
 
from line 9362
 
     - `"user-profiles-2026-03-24"`
 
+    - `"user-profiles-2026-08-18"`
+
     - `"advisor-tool-2026-03-01"`
 
     - `"managed-agents-2026-04-01"`
from line 9572
 
     - `type: "user.interrupt"`
 
-      - `"user.interrupt"`
-
-    - `processed_at: optional string or null`
-
-      A timestamp in RFC 3339 format
-
-    - `session_thread_id: optional string or null`
-
-      If absent, interrupts every non-archived thread 
+      - `"u