Claude Opus 4.6 is Claude's most capable model yet, built for deep reasoning, long-running agentic tasks, and large codebases. The model improves on its predecessor's coding skills with more careful planning, sustained agentic task performance, better operation in larger codebases, and enhanced code review and debugging capabilities to catch its own mistakes. It can also apply these abilities to everyday work tasks including running financial analyses, conducting research, and using and creating documents, spreadsheets, and presentations.

The model features a 1M token context window in beta, adaptive thinking capabilities, and improved planning functionality. It delivers state-of-the-art performance across coding, analysis, research, and real-world work applications. Opus 4.6 can handle multi-step agentic workflows that demand planning and tool calling, break complex tasks into independent subtasks, run tools and subagents in parallel, and identify blockers with precision.

Opus 4.6 demonstrates improved long-context retrieval abilities, performing markedly better than predecessors on needle-in-a-haystack benchmarks. It holds and tracks information over hundreds of thousands of tokens with less drift and picks up buried details that previous models would miss. The model shows significant improvement in maintaining performance across long conversations without context degradation.

The model provides substantial benefits for knowledge work across multiple professional domains including finance, legal, cybersecurity, and software engineering. It excels at complex multi-step coding work, handles large codebase migrations, performs root cause analysis, and maintains focus over extended periods. Early testing shows exceptional performance on economically valuable knowledge work tasks in finance, legal, and other domains.

Target users include developers, knowledge workers, enterprises, and organizations needing advanced AI capabilities for complex tasks. The model integrates with Claude Code for agent teams, Claude Developer Platform APIs, and office tools including Excel and PowerPoint. It's available through multiple platforms including web interfaces, APIs, and major cloud platforms.