create

 
   - `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"`
 

     - `"output-300k-2026-03-24"`
 
     - `"user-profiles-2026-03-24"`
+
+    - `"user-profiles-2026-08-18"`
 
     - `"advisor-tool-2026-03-01"`
 

 
               - `"search_result_location"`
 
-      - `BetaImageBlockParam object { source, type, cache_control }`
+      - `BetaImageBlockParam object { source, type, cache_control, transformations }`
 
         - `source: BetaBase64ImageSource or BetaURLImageSource or BetaFileImageSource`
 

 
           Create a cache control breakpoint at this content block.
 
+        - `transformations: optional BetaImageTransformationsParam or null`
+
+          Configures the transformations the server applies to this image before the model observes it. Each key names a condition the server transforms images for; its value selects the transformation applied. Omitted keys keep their default behavior, and an empty object is equivalent to omitting the field.
+
+          - `oversized_image: optional "downsize" or "error"`
+
+            What the server does when this image exceeds the model's maximum image size. `"downsize"` (the default) scales the image down to fit, which changes the dimensions the model observes without telling you. `"error"` instead rejects the request with a 400 error naming the image's dimensions and the largest dimensions that fit, so you can scale the image deliberately — your image is never silently scaled down.
+
+            - `"downsize"`
+
+            - `"error"`
+
       - `BetaRequestDocumentBlock object { source, type, cache_control, 3 more }`
 
         - `source: BetaBase64PDFSource or BetaPlainTextSource or BetaContentBlockSource or 2 more`

 
                 - `BetaTextBlockParam object { text, type, cache_control, citations }`
 
-                - `BetaImageBlockParam object { source, type, cache_control }`
+                - `BetaImageBlockParam object { source, type, cache_control, transformations }`
 
             - `type: "content"`
 

 
           - `"redacted_thinking"`
 
-      - `BetaToolUseBlockParam object { id, input, name, 3 more }`
+      - `BetaToolUseBlockParam object { id, input, name, 4 more }`
 
         - `id: string`
 

 
               - `"code_execution_20260120"`
 
-      - `BetaToolResultBlockParam object { tool_use_id, type, cache_control, 2 more }`
+        - `toolset_name: optional string or null`
+
+          For a toolset member tool_use, the toolset family this member belongs to.
+
+      - `BetaToolResultBlockParam object { tool_use_id, type, cache_control, 3 more }`
 
         - `tool_use_id: string`
 

 
           Create a cache control breakpoint at this content block.
 
-        - `content: optional string or array of BetaTextBlockParam or BetaImageBlockParam or BetaSearchResultBlockParam or 2 more`
+        - `content: optional string or array of BetaTextBlockParam or BetaImageBlockParam or BetaSearchResultBlockParam or 3 more`
 
           - `string`
 
-          - `array of BetaTextBlockParam or BetaImageBlockParam or BetaSearchResultBlockParam or 2 more`
+          - `array of BetaTextBlockParam or BetaImageBlockParam or BetaSearchResultBlockParam or 3 more`
 
             - `BetaTextBlockParam object { text, type, cache_control, citations }`
 
-            - `BetaImageBlockParam object { source, type, cache_control }`
+            - `BetaImageBlockParam object { source, type, cache_control, transformations }`
 
             - `BetaSearchResultBlockParam object { content, source, title, 3 more }`
 

 
                 Create a cache control breakpoint at this content block.
 
+            - `BetaBrowserStateBlockParam object { tabs, type, cache_control, state_changes }`
+
+              The caller's browser state after a browser toolset member call —
+              the full inventory of open tabs, which tab is active, and any side
+              effects (tabs opened, download state changes) the call produced.
+
+              At most one per `tool_result`, only on a non-error result answering a
+              browser toolset member `tool_use`. The server renders the
+              model-visible text from it; the model never sees the raw fields.
+
+              - `tabs: array of BetaBrowserStateTabEntry`
+
+                All tabs open in the browser after this call — the full inventory, not a delta. May be empty. Whenever non-empty, exactly one entry carries `active: true`.
+
+                - `tab_id: string`
+
+                  The caller-assigned identifier for this tab, unique within the inventory.
+
+                - `title: string`
+
+                  The title of the page the tab is showing. May be empty.
+
+                - `url: string`
+
+                  The URL of the page the tab is showing. May be empty.
+
+                - `active: optional boolean`
+
+                  Whether this tab is the active tab after this call. Whenever `tabs` is non-empty, exactly one entry is marked `active: true`.
+
+              - `type: "browser_state"`
+
+                - `"browser_state"`
+
+              - `cache_control: optional BetaCacheControlEphemeral or null`
+
+                Create a cache control breakpoint at this content block.
+
+              - `state_changes: optional array of BetaBrowserStateChange or null`
+
+                Tabs opened and download state changes during this call. "Nothing to report" is expressed by omitting the field, never by an empty list.
+
+                - `BetaBrowserStateChangeTabOpened object { tab_id, type }`
+
+                  A tab this call's execution opened that remains open at its end —
+                  the creation delta of the `tabs` inventory, not an event log.
+
+                  Carries only the `tab_id`; the tab's `title` and `url` live on its
+                  `tabs` entry, which must include the same `tab_id`. A tab opened
+                  during a failed call gets no deferred `tab_opened`; it simply appears
+                  in the next result's `tabs` inventory.
+
+                  - `tab_id: string`
+
+                    The `tab_id` of the opened tab, present in `tabs`.
+
+                  - `type: "tab_opened"`
+
+                    - `"tab_opened"`
+
+                - `BetaBrowserStateChangeDownloadStarted object { download_id, type, url }`
+
+                  A file download that started during this call.
+
+                  - `download_id: string`
+
+                    The caller-assigned identifier for this download, stable across the state changes reporting it.
+
+                  - `type: "download_started"`
+
+                    - `"download_started"`
+
+                  - `url: string`
+
+                    The final post-redirect URL the download was served from.
+
+                - `BetaBrowserStateChangeDownloadCompleted object { download_id, type, url, 2 more }`
+
+                  A file download that finished during this call, reported with the
+                  same `download_id` as its `download_started` — or without a prior
+                  `download_started`, when the download finished during the call that
+                  started it (at most one state change per `download_id` per result).
+
+                  - `download_id: string`
+
+                    The caller-assigned identifier for this download, stable across the state changes reporting it.
+
+                  - `type: "download_completed"`
+
+                    - `"download_completed"`
+
+                  - `url: string`
+
+                    The final post-redirect URL the download was served from.
+
+                  - `path: optional string or null`
+
+                    Where the executor saved the file, on the executor's filesystem. Only included when another tool in the same environment can read the file at that path.
+
+                  - `size_bytes: optional number or null`
+
+                    The completed download's size.
+
+                - `BetaBrowserStateChangeDownloadFailed object { download_id, type, url, error }`
+
+                  A file download that failed — or was cancelled — during this call.
+
+                  - `download_id: string`
+
+                    The caller-assigned identifier for this download, stable across the state changes reporting it.
+
+                  - `type: "download_failed"`
+
+                    - `"download_failed"`
+
+                  - `url: string`
+
+                    The final post-redirect URL the download was served from.
+
+                  - `error: optional string or null`
+
+                    The failure or cancellation detail, when known.
+
         - `is_error: optional boolean`
+
+        - `toolset_name: optional string or null`
+
+          For a toolset member tool_result, the toolset family of the paired tool_use.
 
       - `BetaServerToolUseBlockParam object { id, input, name, 3 more }`
 

         - `encrypted_content: optional string or null`
 
           Opaque metadata from prior compaction, to be round-tripped verbatim
-
-      - `BetaMidConversationSystemBlockParam object { content, type, cache_control }`
-
-        System instructions that appear mid-conversation.
-
-        Use this block to provide or update system-level instructions at a specific
-        point in the conversation, rather than only via the top-level `system` parameter.
-
-        - `content: array of BetaTextBlockParam or BetaRequestToolAdditionBlock or BetaRequestToolRemovalBlock`
-
-          System instruction text blocks.
-
-          - `BetaTextBlockParam object { text, type, cache_control, citations }`
-
-          - `BetaRequestToolAdditionBlock object { tool, type, cache_control }`
-
-            Mid-conversation directive to surface a declared tool.
-
-            `tool` references a tool (or MCP toolset) by name from the request's
-            `tools`; it is offered to the model from this point in the
-            conversation onward.
-
-            - `tool: BetaToolChangeToolReference or BetaToolChangeMCPToolReference or BetaToolChangeMCPToolsetReference`
-
-              Reference to a single tool the caller declared directly in
-              `tools[]`. Does not accept the composed `{server}_{name}` form the
-              server assigns to MCP-resolved tools — use `mcp_tool_reference` or
-              `mcp_toolset_reference` for those.
-
-              - `BetaToolChangeToolReference object { name, type }`
-
-                Reference to a single tool the caller declared directly in
-                `tools[]`. Does not accept the composed `{server}_{name}` form the
-                server assigns to MCP-resolved tools — use `mcp_tool_reference` or
-                `mcp_toolset_reference` for those.
-
-                - `name: string`
-
-                - `type: "tool_reference"`
-
-                  - `"tool_reference"`
-
-              - `BetaToolChangeMCPToolReference object { name, server_name, type }`
-
-                Reference to a single MCP tool by its server and remote name — the
-                same `server_name`/`name` pair `mcp_tool_use` carries.
-
-                - `name: string`
-
-                - `server_name: string`
-
-                - `type: "mcp_tool_reference"`
-
-                  - `"mcp_tool_reference"`
-
-              - `BetaToolChangeMCPToolsetReference object { server_name, type }`
-
-                Reference to every tool in the named MCP server's toolset.
-
-                - `server_name: string`
-
-                - `type: "mcp_toolset_reference"`
-
-                  - `"mcp_toolset_reference"`
-
-            - `type: "tool_addition"`
-
-              - `"tool_addition"`
-
-            - `cache_control: optional BetaCacheControlEphemeral or null`
-
-              Create a cache control breakpoint at this content block.
-
-          - `BetaRequestToolRemovalBlock object { tool, type, cache_control }`
-
-            Mid-conversation directive to withdraw a tool.
-
-            `tool` references a tool (or MCP toolset) by name from the request's
-            `tools`; it is no longer offered to the model from this point in the
-            conversation onward.
-
-            - `tool: BetaToolChangeToolReference or BetaToolChangeMCPToolReference or BetaToolChangeMCPToolsetReference`
-
-              Reference to a single tool the caller declared directly in
-              `tools[]`. Does not accept the composed `{server}_{name}` form the
-              server assigns to MCP-resolved tools — use `mcp_tool_reference` or
-              `mcp_toolset_reference` for those.
-
-              - `BetaToolChangeToolReference object { name, type }`
-
-                Reference to a single tool the caller declared directly in
-                `tools[]`. Does not accept the composed `{server}_{name}` form the
-                server assigns to MCP-resolved tools — use `mcp_tool_reference` or
-                `mcp_toolset_reference` for those.
-
-              - `BetaToolChangeMCPToolReference object { name, server_name, type }`
-
-                Reference to a single MCP tool by its server and remote name — the
-                same `server_name`/`name` pair `mcp_tool_use` carries.
-
-              - `BetaToolChangeMCPToolsetReference object { server_name, type }`
-
-                Reference to every tool in the named MCP server's toolset.
-
-            - `type: "tool_removal"`
-
-              - `"tool_removal"`
-
-            - `cache_control: optional BetaCacheControlEphemeral or null`
-
-              Create a cache control breakpoint at this content block.
-
-        - `type: "mid_conv_system"`
-
-          - `"mid_conv_system"`
-
-        - `cache_control: optional BetaCacheControlEphemeral or null`
-
-          Create a cache control breakpoint at this content block.
 
       - `BetaRequestToolAdditionBlock object { tool, type, cache_control }`
 

         `tools`; it is offered to the model from this point in the
         conversation onward.
 
+        - `tool: BetaToolChangeToolReference or BetaToolChangeMCPToolReference or BetaToolChangeMCPToolsetReference`
+
+          Reference to a single tool the caller declared directly in
+          `tools[]`. Does not accept the composed `{server}_{name}` form the
+          server assigns to MCP-resolved tools — use `mcp_tool_reference` or
+          `mcp_toolset_reference` for those.
+
+          - `BetaToolChangeToolReference object { name, type }`
+
+            Reference to a single tool the caller declared directly in
+            `tools[]`. Does not accept the composed `{server}_{name}` form the
+            server assigns to MCP-resolved tools — use `mcp_tool_reference` or
+            `mcp_toolset_reference` for those.
+
+            - `name: string`
+
+            - `type: "tool_reference"`
+
+              - `"tool_reference"`
+
+          - `BetaToolChangeMCPToolReference object { name, server_name, type }`
+
+            Reference to a single MCP tool by its server and remote name — the
+            same `server_name`/`name` pair `mcp_tool_use` carries.
+
+            - `name: string`
+
+            - `server_name: string`
+
+            - `type: "mcp_tool_reference"`
+
+              - `"mcp_tool_reference"`
+
+          - `BetaToolChangeMCPToolsetReference object { server_name, type }`
+
+            Reference to every tool in the named MCP server's toolset.
+
+            - `server_name: string`
+
+            - `type: "mcp_toolset_reference"`
+
+              - `"mcp_toolset_reference"`
+
+        - `type: "tool_addition"`
+
+          - `"tool_addition"`
+
+        - `cache_control: optional BetaCacheControlEphemeral or null`
+
+          Create a cache control breakpoint at this content block.
+
       - `BetaRequestToolRemovalBlock object { tool, type, cache_control }`
 
         Mid-conversation directive to withdraw a tool.

         `tool` references a tool (or MCP toolset) by name from the request's
         `tools`; it is no longer offered to the model from this point in the
         conversation onward.
+
+        - `tool: BetaToolChangeToolReference or BetaToolChangeMCPToolReference or BetaToolChangeMCPToolsetReference`
+
+          Reference to a single tool the caller declared directly in
+          `tools[]`. Does not accept the composed `{server}_{name}` form the
+          server assigns to MCP-resolved tools — use `mcp_tool_reference` or
+          `mcp_toolset_reference` for those.
+
+          - `BetaToolChangeToolReference object { name, type }`
+
+            Reference to a single tool the caller declared directly in
+            `tools[]`. Does not accept the composed `{server}_{name}` form the
+            server assigns to MCP-resolved tools — use `mcp_tool_reference` or
+            `mcp_toolset_reference` for those.
+
+          - `BetaToolChangeMCPToolReference object { name, server_name, type }`
+
+            Reference to a single MCP tool by its server and remote name — the
+            same `server_name`/`name` pair `mcp_tool_use` carries.
+
+          - `BetaToolChangeMCPToolsetReference object { server_name, type }`
+
+            Reference to every tool in the named MCP server's toolset.
+
+        - `type: "tool_removal"`
+
+          - `"tool_removal"`
+
+        - `cache_control: optional BetaCacheControlEphemeral or null`
+
+          Create a cache control breakpoint at this content block.
 
       - `BetaFallbackBlockParam object { from, to, type, trigger }`
 

 
       When true, guarantees schema validation on tool names and inputs
 
+  - `BetaBrowserToolset20260801 object { type, allowed_callers, cache_control, configs }`
+
+    The browser toolset: a single `tools[]` entry (carrying no
+    `name`) that declares the browser tool family. The model is served
+    the family's tool with any members disabled via `configs` removed
+    from its schema.
+
+    - `type: "browser_toolset_20260801"`
+
+      - `"browser_toolset_20260801"`
+
+    - `allowed_callers: optional array of "direct" or "code_execution_20250825" or "code_execution_20260120" or "code_execution_20260521"`
+
+      - `"direct"`
+
+      - `"code_execution_20250825"`
+
+      - `"code_execution_20260120"`
+
+      - `"code_execution_20260521"`
+
+    - `cache_control: optional BetaCacheControlEphemeral or null`
+
+      Create a cache control breakpoint at this content block.
+
+    - `configs: optional BetaBrowserToolsetConfigs or null`
+
+      Per-member configuration for `browser_toolset_20260801`: one
+      optional field per member tool, keyed by the member name — the same
+      name the member's `tool_use` blocks carry. Every member is an
+      accepted key, and a member's defaults apply wherever its key is
+      absent. Unknown keys are rejected: the field set is this toolset
+      version's complete member set.
+
+      - `close_tab: optional BetaBrowserCloseTabConfig or null`
+
+        `close_tab`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `double_click: optional BetaBrowserDoubleClickConfig or null`
+
+        `double_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `file_upload: optional BetaBrowserFileUploadConfig or null`
+
+        `file_upload`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `find: optional BetaBrowserFindConfig or null`
+
+        `find`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `form_input: optional BetaBrowserFormInputConfig or null`
+
+        `form_input`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `get_page_text: optional BetaBrowserGetPageTextConfig or null`
+
+        `get_page_text`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `hold_key: optional BetaBrowserHoldKeyConfig or null`
+
+        `hold_key`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `hover: optional BetaBrowserHoverConfig or null`
+
+        `hover`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `javascript_exec: optional BetaBrowserJavascriptExecConfig or null`
+
+        `javascript_exec`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `key: optional BetaBrowserKeyConfig or null`
+
+        `key`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `left_click: optional BetaBrowserLeftClickConfig or null`
+
+        `left_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `left_click_drag: optional BetaBrowserLeftClickDragConfig or null`
+
+        `left_click_drag`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `left_mouse_down: optional BetaBrowserLeftMouseDownConfig or null`
+
+        `left_mouse_down`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `left_mouse_up: optional BetaBrowserLeftMouseUpConfig or null`
+
+        `left_mouse_up`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `list_tabs: optional BetaBrowserListTabsConfig or null`
+
+        `list_tabs`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `middle_click: optional BetaBrowserMiddleClickConfig or null`
+
+        `middle_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `mouse_move: optional BetaBrowserMouseMoveConfig or null`
+
+        `mouse_move`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `navigate: optional BetaBrowserNavigateConfig or null`
+
+        `navigate`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `new_tab: optional BetaBrowserNewTabConfig or null`
+
+        `new_tab`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `read_console: optional BetaBrowserReadConsoleConfig or null`
+
+        `read_console`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `read_network: optional BetaBrowserReadNetworkConfig or null`
+
+        `read_network`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `read_page: optional BetaBrowserReadPageConfig or null`
+
+        `read_page`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `right_click: optional BetaBrowserRightClickConfig or null`
+
+        `right_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `screenshot: optional BetaBrowserScreenshotConfig or null`
+
+        `screenshot`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `scroll: optional BetaBrowserScrollConfig or null`
+
+        `scroll`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `scroll_to: optional BetaBrowserScrollToConfig or null`
+
+        `scroll_to`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `switch_tab: optional BetaBrowserSwitchTabConfig or null`
+
+        `switch_tab`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `triple_click: optional BetaBrowserTripleClickConfig or null`
+
+        `triple_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `type: optional BetaBrowserTypeConfig or null`
+
+        `type`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `wait: optional BetaBrowserWaitConfig or null`
+
+        `wait`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `zoom: optional BetaBrowserZoomConfig or null`
+
+        `zoom`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
   - `BetaToolComputerUse20241022 object { display_height_px, display_width_px, name, 7 more }`
 
     - `display_height_px: number`

     - `strict: optional boolean`
 
       When true, guarantees schema validation on tool names and inputs
+
+  - `BetaComputerToolset20260801 object { type, allowed_callers, cache_control, configs }`
+
+    The computer toolset: a single `tools[]` entry (carrying no
+    `name`) that declares the computer tool family. The model is
+    served the family's tool with any members disabled via `configs`
+    removed from its schema. Every member is enabled by default, zoom
+    included. The single-tool options `display_number` and
+    `enable_zoom` are not fields of a toolset entry — it carries only
+    `type`, `configs`, and `cache_control`; zoom is controlled
+    via `configs.zoom.enabled`.
+
+    - `type: "computer_toolset_20260801"`
+
+      - `"computer_toolset_20260801"`
+
+    - `allowed_callers: optional array of "direct" or "code_execution_20250825" or "code_execution_20260120" or "code_execution_20260521"`
+
+      - `"direct"`
+
+      - `"code_execution_20250825"`
+
+      - `"code_execution_20260120"`
+
+      - `"code_execution_20260521"`
+
+    - `cache_control: optional BetaCacheControlEphemeral or null`
+
+      Create a cache control breakpoint at this content block.
+
+    - `configs: optional BetaComputerToolsetConfigs or null`
+
+      Per-member configuration for `computer_toolset_20260801`: one
+      optional field per member tool, keyed by the member name — the same
+      name the member's `tool_use` blocks carry. Every member is an
+      accepted key, and a member's defaults apply wherever its key is
+      absent. Unknown keys are rejected: the field set is this toolset
+      version's complete member set.
+
+      - `cursor_position: optional BetaComputerCursorPositionConfig or null`
+
+        `cursor_position`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `double_click: optional BetaComputerDoubleClickConfig or null`
+
+        `double_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `hold_key: optional BetaComputerHoldKeyConfig or null`
+
+        `hold_key`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `key: optional BetaComputerKeyConfig or null`
+
+        `key`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `left_click: optional BetaComputerLeftClickConfig or null`
+
+        `left_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `left_click_drag: optional BetaComputerLeftClickDragConfig or null`
+
+        `left_click_drag`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `left_mouse_down: optional BetaComputerLeftMouseDownConfig or null`
+
+        `left_mouse_down`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `left_mouse_up: optional BetaComputerLeftMouseUpConfig or null`
+
+        `left_mouse_up`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `middle_click: optional BetaComputerMiddleClickConfig or null`
+
+        `middle_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `mouse_move: optional BetaComputerMouseMoveConfig or null`
+
+        `mouse_move`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `right_click: optional BetaComputerRightClickConfig or null`
+
+        `right_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `screenshot: optional BetaComputerScreenshotConfig or null`
+
+        `screenshot`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `scroll: optional BetaComputerScrollConfig or null`
+
+        `scroll`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `triple_click: optional BetaComputerTripleClickConfig or null`
+
+        `triple_click`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `type: optional BetaComputerTypeConfig or null`
+
+        `type`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `wait: optional BetaComputerWaitConfig or null`
+
+        `wait`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
+
+      - `zoom: optional BetaComputerZoomConfig or null`
+
+        `zoom`'s config overrides.
+
+        - `defer_loading: optional boolean or null`
+
+          Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
+
+        - `enabled: optional boolean or null`
+
+          Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
 
   - `BetaToolTextEditor20250124 object { name, type, allowed_callers, 4 more }`
 

 
         - `"redacted_thinking"`
 
-    - `BetaToolUseBlock object { id, input, name, 2 more }`
+    - `BetaToolUseBlock object { id, input, name, 3 more }`
 
       - `id: string`
 

           - `type: "code_execution_20260120"`
 
             - `"code_execution_20260120"`
+
+      - `toolset_name: optional string or null`
+
+        For a toolset member tool_use, the toolset family.
 
     - `BetaServerToolUseBlock object { id, input, name, 2 more }`
 

               "role": "user"
             }
           ],
-          "model": "claude-opus-4-6",
+          "model": "claude-opus-5",
           "stream": false,
           "system": [
             {

       "type": "model_changed"
     }
   },
-  "model": "claude-opus-4-6",
+  "model": "claude-opus-5",
   "role": "assistant",
   "stop_details": {
     "category": "cyber",
     "explanation": "This request was declined because it conflicts with Anthropic's Usage Policy.",
     "fallback_credit_token": "QW50aHJvcGljL0NsYXVkZQ==",
     "fallback_has_prefill_claim": true,
-    "recommended_model": "claude-sonnet-4-6",
+    "recommended_model": "claude-opus-4-8",
     "type": "refusal"
   },
   "stop_reason": "end_turn",