Claude Opus 4.1

What is the Claude Opus 4.1 API?

Claude Opus 4.1 is our most intelligent model to date with a 200K context window, pushing the frontier in coding, agentic search, and creative writing. We’ve also made it possible to run Claude Code in the background, enabling developers to assign long-running coding tasks for Opus to handle independently.

Claude Opus 4.1 API is available on the JoJ API marketplace. Subscribe with a single JoJ API key, call it through one gateway, and pay from one wallet — no separate account or contract with the provider.