Anthropic Blocks OpenClaw from Claude Subscriptions, Acquires Coefficient Bio for $400M, and Launches 'Cowork' Legal AI Suite

Starting April 4, 2026, Anthropic ended the ability for Claude Pro and Max subscribers ($200/month) to route usage through third-party frameworks like OpenClaw and OpenCode, citing capacity management; Head of Claude Code Boris Cherny noted subscriptions were not designed for these usage patterns, which could otherwise cost users over $1,000/month via API. Users are now directed to a pay-as-you-go option for 'extra usage,' a policy set to extend to additional third-party harnesses. Separately on April 6, Anthropic announced a $400M acquisition of Coefficient Bio, deepening its Claude Life Sciences platform targeting biopharma scientists, clinical coordinators, and regulatory managers. Anthropic also launched 'Cowork,' an AI agent suite for legal tasks including contract review and NDA triage, which triggered a sell-off in legal-tech SaaS stocks.