OpenCode is an agentic coding CLI, similar to Claude Code, Codex etc. It supports different LLM providers, including Claude.

It originally had support for copying over your Claude subscription token and calling the same backend APIs as Claude Code, which meant you could use OpenCode with your Claude Pro/Max plans, but Anthropic came out and said that the plans were only meant for first-party clients, and everyone else should be using per-token billing.

Now OpenCode is removing this option from their product, it seems because of legal threats from Anthropic.

OpenCode is a agent .. harnest? The CLI or UI tool you use as an AI agent, similar to ClaudeCode.

You where not allowed to use your ClaudeCode subscription with other tool then ClaudeCode. I'm not sure if this is what got removed or if there is more too it.

Anthropic's ToS doesn't allow the subscribers to use third party tools that utilizes the APIs Claude Code uses. Open Code is one of those tools.