Releases Index
Anthropic

Anthropic

$npx @buildinternet/releases get anthropic
All releasesBy productClaudeClaude CodeClaude Platform

Prompt and agent hooks no longer allow what they should block

This release1 enhancementImprovements to existing features1 fixBug fixesAI-tallied from the release notes
Claude Code · v2.1.294

Fixed an issue where prompt and agent hooks written as instructions, such as "Block commands that...", allowed what they should block. Improved how prompt hooks on Stop and SubagentStop written as instructions are judged, so Claude is less likely to stop early.

Read more →

Haiku 5.5 default; MCP connection memory leak fixed

This release3 featuresNew capabilities8 enhancementsImprovements to existing features28 fixesBug fixesAI-tallied from the release notes
Claude Code · v2.1.293

Claude Haiku 5.5 (claude-haiku-5-5) is now the default Haiku model on the Anthropic API with 1M context and $0.10/$0.50 per Mtok. Fixed a memory leak where an HTTP MCP connection retained every request until it closed, along with fixes for work retraction after context compaction and lost messages when backgrounding sessions.

Read more →

web_fetch now limited to URLs seen in session context

BreakingThis release1 enhancementImprovements to existing featuresAI-tallied from the release notes

The web_fetch tool in Claude Managed Agents now fetches only URLs that have already appeared in the session, via user messages, web_search results, or previously fetched pages; URLs appearing only in Claude's output, system prompt, attached documents, or tool outputs return a url_not_in_prior_context error. The restriction is intended to reduce data exfiltration risk.

Read more →

Claude Haiku 5.5: 1M context, adaptive thinking

This release1 featureNew capabilitiesAI-tallied from the release notes

Claude Haiku 5.5 (claude-haiku-5-5) is tuned for high-volume, latency-sensitive work with a 1M token context window, 128k max output tokens, and adaptive thinking with an effort parameter. It is available on Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud, and Microsoft Foundry.

Read more →

Web tools enforce allowed_hosts under limited networking

BreakingThis release1 featureNew capabilitiesAI-tallied from the release notes

In Claude Managed Agents, cloud environments with limited networking now apply allowed_hosts to the web_search and web_fetch tools: web_fetch returns a url_not_allowed error for non-matching hosts, web_search omits their results, and neither tool returns results when allowed_hosts lists no hosts.

Read more →

Max and Team plans get monthly API credits

This release1 featureNew capabilitiesAI-tallied from the release notes

Max and Team plans now include monthly API credits for running your own apps and agents on the Claude Platform, claimed by linking a Claude Console organization in Settings > Billing for Max or Organization settings > Billing for Team.

Read more →

Browser and computer use toolsets land in SDKs

This release2 featuresNew capabilitiesAI-tallied from the release notes

Python and TypeScript SDKs now include beta classes for the browser use and computer use tools; subclass one and write a method per tool against your own browser or desktop automation, while the SDK runs the tool loop, URL and file policies, and approval callback.

Read more →

Sandbox escapes patched; plugin install gets --marketplace

Breaking (minor)This release6 featuresNew capabilities45 fixesBug fixesAI-tallied from the release notes
Claude Code · v2.1.292

Claude Code v2.1.292 adds a --marketplace <source> option to claude plugin install and an effort parameter for the Agent tool, plus an overloaded-request retry delay env var. It also closes several sandbox and permission bypasses, including sandboxed commands reading staged /ultrareview upload file copies, managed read-deny paths not dropping project grants, network-path reads skipping the permission prompt, and a tampered settings cache disabling the policy plugin.

Read more →

Mod hooks gain serverToolUses; proxy beta-header requests fixed

This release10 featuresNew capabilities2 enhancementsImprovements to existing features42 fixesBug fixesAI-tallied from the release notes
Claude Code · v2.1.290

Mod and plugin hooks gain richer context: serverToolUses in turn.step results, agentId on tool.check events, a ceiling on required approvals, and theme typing for drawing. The release also fixes requests failing behind proxies that reject beta headers, sessions with hundreds of images getting stuck on unprocessable-request errors, WebFetch silently dropping text past 100,000 characters, and compaction failures plus scheduled tasks vanishing on resume. Added claude attach and claude logs accepting partial session names, and a Deny button on the Claude apps gateway sign-in approval page.

Read more →