Anthropic changelog

What's changed Added a code key to the Claude apps gateway's managed.policies[] : the same settings as cli , also applied in Claude Desktop's Code tab; beside desktop , it turns…

What's changed Added claude_code_version to the initialize control response so clients know the CLI version before the first turn Added autoCompactWindow to AgentDefinition , so…

Features api: add types for the Chat and Cowork unified analytics metrics api: add workflows, multiagent configuration and thread status filtering to Managed Agents Chores…

Features api: add types for the Chat and Cowork unified analytics metrics api: add workflows, multiagent configuration and thread status filtering to Managed Agents Chores…

What's changed Added overageEnabled to SDKRateLimitInfo : on usage-limit warnings, whether the account has extra usage turned on Fixed an MCP server added with mcp_set_servers…

What's changed Updated to parity with Claude Code v2.1.294 Update npm install @anthropic-ai/claude-agent-sdk@0.3.294 # or yarn add @anthropic-ai/claude-agent-sdk@0.3.294 # or…

What's changed Added onFailure: "block" for command and HTTP hooks: a hook that can't start, times out, or exits with an unexpected code blocks the action instead of letting it…

What's changed Fixed prompt and agent hooks written as instructions (such as "Block commands that...") allowing what they should block Improved how prompt hooks on Stop and…

Chores ci: check that pull requests update the changelog docs: note that listing Claude Console spend limits is in early access internal: match the package version in uv.lock

Chores ci: check that pull requests update the changelog

Chores ci: check that pull requests update the changelog

Chores ci: check that pull requests update the changelog

Chores ci: check that pull requests update the changelog

Chores ci: check that pull requests update the changelog

What's changed Added an optional subagent_type to background_tasks_changed task entries, so hosts can name each subagent's type without pairing with task_started Updated to…

What's changed Added Claude Haiku 5.5 ( claude-haiku-5-5 ), now the default Haiku model on the Anthropic API — 1M context, $0.10/$0.50 per Mtok ($0.50/$2.50 for prompts over…

0.0.18 (2026-10-07) Full Changelog: google-cloud-sdk-v0.0.17...google-cloud-sdk-v0.0.18

0.20.3 (2026-10-07) Full Changelog: vertex-sdk-v0.20.2...vertex-sdk-v0.20.3

0.132.0 (2026-10-07) Full Changelog: sdk-v0.131.0...sdk-v0.132.0 Features api: add claude-haiku-5-5 and typed computer and browser toolset tool calls ( 1fd8261 ) api: add…

We just launched Claude Haiku 5.5, the cheapest, fastest, and most capable small model we’ve released, designed for high-volume, cost-sensitive tasks. For more information, see…

0.05x the base input price instead of 0.1x. Cache writes and all other prices are unchanged. See Prompt caching pricing. We've launched Claude Haiku 5.5 (claude-haiku-5-5), our…

What's changed Added --marketplace source to claude plugin install : adds the marketplace if needed, under the same policy checks as claude plugin marketplace add , then installs…

What's changed Fixed a regression in 2.1.290 where cloud sessions could drop answers to permission prompts Fixed a regression in 2.1.288 where the last messages of a session…

What's changed Added agent_id to the assistant and user messages a subagent produces; it equals the task_id on that subagent's task events and stays the same when the subagent is…

What's changed Updated to parity with Claude Code v2.1.291 Update npm install @anthropic-ai/claude-agent-sdk@0.3.291 # or yarn add @anthropic-ai/claude-agent-sdk@0.3.291 # or…

What's changed Added serverToolUses to the result of a mod's turn.step hook: the tool calls the API ran itself (the advisor), each with its id, name, input, start and end Added…

What's changed Added an optional offset field to the WebFetch tool input for reading on through long pages Fixed failed Claude in Chrome tool calls dropping the result's _meta :…

What's changed Fixed a deny or ask rule on a nested part of a compound shell command not holding over a user-installed mod's approval on managed machines Fixed the terminal…

What's changed Updated to parity with Claude Code v2.1.289 Update npm install @anthropic-ai/claude-agent-sdk@0.3.289 # or yarn add @anthropic-ai/claude-agent-sdk@0.3.289 # or…

What's changed Added $.ui.selection() for mods: returns the text you last selected in fullscreen mode and, when the selection lies within one transcript row, that row Added a…

What's changed Updated to parity with Claude Code v2.1.288 Update npm install @anthropic-ai/claude-agent-sdk@0.3.288 # or yarn add @anthropic-ai/claude-agent-sdk@0.3.288 # or…

What's changed Added Claude Mods: plugins may now modify deeper behavior Added You should know, a built-in mod where a side agent watches your back and flags things you or Claude…

What's changed Added optional remote-session latency fields ( first_text_post_queue_wait_ms , first_text_post_queued_behind ) to the success result message Fixed…

We just launched Claude Sonnet 5.5, the second model in our Claude 5.5 family. Sonnet 5.5 is a faster, lower-cost complement to Claude Opus 5.5. For more information, see our…

You can now submit plugins to the Claude directory through a new developer portal, track them through review, and see usage analytics once they’re live. For more information, see…

We just launched Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5.…

We're rolling out a new Claude experience that makes everything Claude Cowork does available from any conversation. Ask a quick question or hand Claude a bigger task, like a…

We've launched Salesforce in Claude, a plugin that brings a seller’s accounts, opportunities, and pipeline into Claude with 37 pre-built sales skills. Prep a call, review a deal,…