Anthropic made unified chat and Cowork GA for Enterprise with an Efficient mode and spend controls. Existing orgs flip on 16 November unless admins opt out.
MCP tasks are in public beta in the Claude Code CLI from v2.1.304. A server runs the job, Claude carries on, and the task can ask you questions while it runs.
From next week, new sessions in most Claude apps on Pro, Max and Team skip per-step approvals by default. Here is where Manual lives and who stays opt-in.
Anthropic's red team and Theorem used Claude to write Rocq proofs for 123 open-source libraries. The proofs carry real assumptions and cost many tokens.
Anthropic's first API version since 2023 returns a 400 for temperature, top_p or top_k. New major SDKs send it by default. What breaks and how to stay put.
Reuters, citing the Financial Times, says Anthropic offered Blackstone above 10% on $9 billion of chip debt. Reuters says it has not verified the report.
On 29 October 2026 Haiku 4.5 leaves the selector for Free, Pro and Max, including desktop and mobile. Claude Code, Team, Enterprise and the API are unchanged.
Anthropic and an arXiv paper say Claude Mythos 5 beat their baselines on seven of eight quantum tasks. The counts are logical estimates, not hardware runs.
Anthropic's 15 October note says the Compliance API can return members' Instructions for Claude and Cowork global instructions, in beta for Enterprise.
Anthropic's 15 October article makes Code Review generally available for Team and Enterprise. Eligible Enterprise orgs can claim credits by 15 January 2027.
Anthropic says six METR employees now have employee-like access, and that it cannot veto their reports. Redactions are limited to categories the post names.
404 Media says an Accenture memo, from 1 October, centrally funds $29 a person a month for Claude. Overages go to project budgets. The $29 is 404's account.