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Claude Opus 4.6 - Anthropic's latest programmable AI model

Claude Opus 4.6 is Anthropic's flagship AI model, an upgrade from Claude Opus 4.5. The model is the first to support an ultra-long context window of 1 million tokens, leading the way in programming, inference, and complex task processing.

What is Claude Opus 4.6?

Claude Opus 4.6, Anthropic's flagship AI model, is an upgrade from Claude Opus 4.5. For the first time, the model supports an ultra-long context window of 1 million tokens, leading across the board in programming, reasoning, and complex task processing. Claude Opus 4.6 broke records in benchmark tests such as Terminal-Bench 2.0 and Humanity’s Last Exam, with its GDPval-AA score surpassing GPT-5.2 by 144 Elo points. New features include adaptive thinking and context compression, enabling it to autonomously perform enterprise-level tasks such as financial analysis, code review, and document processing, marking a paradigm shift in AI from tools to autonomous intelligent agents.

Main features of Claude Opus 4.6

  • Long context processingClaude Opus 4.6 is the first to support context windows of 1 million tokens, achieving 76% accuracy in MRCR v2 tests, significantly better than the previous generation model's 18.5%, thus solving the "context decay" problem common in large models.
  • Adaptive thinking mechanismThe model can automatically determine whether deep reasoning is needed based on the difficulty of the task. Developers can manually set four thinking levels: low, medium, high, and max, to flexibly balance quality, speed, and cost.
  • Context compression technologyAutomatically compresses historical conversations into summaries, freeing up space for new content and allowing Claude to perform tasks for longer periods without being interrupted by context overflow.
  • Enterprise-level work capabilitiesIt can autonomously perform financial analysis, legal research, document creation, spreadsheet processing, and presentation creation, and outperforms GPT-5.2 by approximately 144 Elo points in the GDPval-AA test.
  • Programming and Code ReviewIt achieved the highest score in the Terminal-Bench 2.0 agent coding evaluation, and has the ability to review code, debug, develop in multiple languages and maintain large code bases, and can maintain an autonomous workflow for a long time.
  • Online information retrievalIt outperforms all other models in the BrowseComp test, excels at finding hard-to-find information online, and can process and infer large amounts of network data by combining the context of 1 million tokens.
  • Office suite integration: Through the Claude in Excel and Claude in PowerPoint add-ins, it can be directly integrated into office software, supporting pivot table editing, chart modification, slide master reading, and brand consistency maintenance.
  • Safety and AlignmentIt exhibits low misleading, low flattery, and low over-rejection rates in automated behavior auditing, and its overall security profile is comparable to or better than Claude Opus 4.5, making it one of the best-aligned leading models in the industry.

Claude Opus 4.6 performance

  • In Terminal-Bench 2.0 agent coding evaluationClaude Opus 4.6 achieved a score of 65.4%, the highest among all models.
  • In Humanity’s Last Exam Complex Multidisciplinary Reasoning TestClaude Opus 4.6 is ahead of all other cutting-edge models.
  • In GDPval-AA Real Knowledge Work Task AssessmentThe Claude Opus 4.6 scored 1606 Elo points, about 144 points higher than the GPT-5.2 and 190 points higher than its predecessor, the Claude Opus 4.5.
  • In BrowseComp web information retrieval testClaude Opus 4.6 achieved 84.0%, outperforming GPT-5.2 Pro's 77.9%.
  • In the ARC AGI 2 Fluid Intelligence TestClaude Opus 4.6 achieved a score of 68.8%, significantly surpassing the GPT-5.2 Pro's score of over 50%.
  • In the OSWorld computer operation skills testThe Claude Opus 4.6 achieved a 72.7% rating, a significant improvement over the previous generation Opus 4.5's 66.3%.
  • In MRCR v2 long context retrieval testsThe 1 million token eight-pin variant achieved 76%, while Sonnet 4.5 only achieved 18.5%.
  • In SWE-bench Verified code fix testIn the meantime, an average of 80.8% was achieved after 25 trials, suggesting that optimization could reach 81.42%.

How to use Claude Opus 4.6

  • Use via Claude web interfaceLog in to Claude to access Claude Opus 4.6 directly; no additional configuration is required, and the models are already fully available on the web version.
  • via API callDevelopers can use model names claude-opus-4-6 Make an API call.
  • Using Claude CodeAfter installing Claude Code, you can directly call Opus 4.6 via the command line to perform programming tasks. It supports intelligent agent team functions and can be used... /effort Adjust the parameters to the desired speed.

Application scenarios of Claude Opus 4.6

  • Software Development and ProgrammingClaude Opus 4.6 can be used for reviewing and maintaining large codebases, supports multi-language development environments, and enables developers to manage complex projects efficiently.
  • Code debugging and fixingThe model has code debugging and error repair capabilities, and can autonomously locate problems and generate repair solutions, reducing the time developers spend manually troubleshooting.
  • Long-term autonomous workflowIn complex software engineering tasks, Claude Opus 4.6 can maintain a long-term autonomous workflow without frequent manual intervention, making it suitable for large-scale project development.
  • Financial AnalysisFinancial analysts can use Claude Opus 4.6 to run complex financial analysis and modeling tasks, quickly generating professional reports and data insights.
  • Legal document reviewLegal professionals can use the extended context window to review hundreds of pages of legal documents and complete large-scale document analysis in one go.
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