TL;DR
- Claude Haiku 5.5 model is now available in the TypeScript SDK along with typed computer and browser toolset tool calls
- Managed Agents gains web_fetch source URL configuration and the agent tools limit is documented at 256 tools
- Bug fixes include proper handling of JSONL streams iterated twice and recovery of local edits after memory uploads with lost responses
- Text Completions API is marked deprecated in favor of newer messaging endpoints
- Version
- 0.132.0
- Released
- October 7, 2026
- Agent tools limit
- 256
What happened
Anthropic released TypeScript SDK version 0.132.0 on October 7, 2026. The release brings support for Claude Haiku 5.5, a new model variant within the SDK. The update also expands tooling capabilities for developers building with Managed Agents and introduces improvements to error handling and API consistency.
New model and tool capabilities
The SDK now includes the claude-haiku-5-5 model and adds support for typed computer and browser toolset tool calls. This enables developers to use structured tool definitions for browser and computer interaction tasks. For Managed Agents specifically, the web_fetch tool configuration now accepts url_sources, allowing more granular control over which URLs agents can access when fetching web content. The release also documents that agents can have up to 256 tools available, clarifying a previously unspecified limit.
Model capabilities updates
The SDK reflects broader capability updates across Claude models. The thinking types now include a disabled field within model capabilities, allowing developers to check whether extended thinking is available. Web search and code execution support have been added to model capabilities, enabling runtime checks for these features before attempting to use them. Additionally, the models endpoint now includes lifecycle stage fields and filtering, helping developers understand which models are in what stage of their lifecycle.
Bug fixes and stability
The release addresses several correctness issues. JSONL streams now properly throw an error when iterated more than once, preventing silent data loss from repeated iteration. A fix ensures that local edits made after a memory upload whose response was lost are now kept, improving reliability when working with persistent memory tools. The client also now sends the beta header by default when listing spend limits, ensuring correct API behavior for that endpoint.
Deprecations and role updates
The Text Completions API is marked as deprecated, signaling that developers should migrate to the Messages API for new work. Role-based access control (RBAC) configuration gains a display_name field and the name field is deprecated, giving teams a clearer way to label roles in their organization. The include_default parameter is now available when listing workspaces, letting clients filter workspace results based on whether they include default workspaces.
What to do
Developers should update to v0.132.0 to access Claude Haiku 5.5 and the improved agent tooling configuration. If you are building with Managed Agents, review the 256-tool limit and the url_sources parameter for web_fetch to ensure your agent configurations stay within constraints. Teams using the Text Completions API should plan a migration to the Messages API. Check the SDK documentation and the release notes on GitHub for full migration guidance and code examples.
Check before upgrading
- Text Completions API is deprecated in favor of the Messages API
- RBAC role name field is deprecated; use display_name instead
Source
Anthropic TypeScript SDK Releaseshttps://github.com/anthropics/anthropic-sdk-typescript/releases/tag/sdk-v0.132.0AI-assisted, verified against the source. This post was drafted with AI from the primary source linked above and checked automatically against it. For anything you depend on, read the original.
- #typescript
- #claude
- #sdk
- #agenttools
- #api
