Anthropic restricts Claude Pro, breaks OpenCode

Anthropic is aggressively closing its ecosystem to prevent "subsidized" 3rd party usage of its flagship models. By locking the $20/month rate to its own tools, Anthropic ensures it captures all user telemetry and interaction data. OpenCode and other CLI-first tools are the primary targets as they directly compete with "Claude Code," signaling a shift from open model access to platform lock-in. Developers now face a choice between the official CLI or significantly higher API costs, with technical detection of "unusual traffic patterns" being used to enforce these terms via account bans.