claude-opus-4-8

Claude Opus 4.8 is our most intelligent Opus model and the best generally available model for coding and agents, with deeper reasoning for enterprise workflows.

Claude Opus 4.8 is our most intelligent Opus model and the best generally available model for coding and agents, with deeper reasoning for enterprise workflows.

Version 2 of Claude Opus 4.8 is hosted on Azure infrastructure. Microsoft Foundry Claude models on Azure infrastructure have full Azure data residency for inference processing. Version 2 supports both Global Standard and US DataZone deployment types.

Version 2 currently supports core Messages API capabilities, including tool use and prompt caching, as well as agentic capabilities such as Structured Outputs, Web Search, Web Fetch, MCP Connector, and Tool Search. See API features for details.

If you need additional features like Code Execution and the Files API, you can use Version 1 , which is hosted on Anthropic infrastructure. We will be adding those API capabilities to Version 2 in the coming months.

Please refer to the Claude Opus 4.8 System Card .

January 2026

Image & text input: With powerful vision capabilities, Claude Opus 4.8 can process images and return text outputs to analyze and understand charts, graphs, technical diagrams, reports, and other visual assets.

Text output: Claude Opus 4.8 can output text of a variety of types and formats, such as prose, lists, Markdown tables, JSON, HTML, code in various programming languages, and more.

Claude Opus 4.8 can understand and output a wide variety of languages, such as English, French, Standard Arabic, Mandarin Chinese, Japanese, Korean, Spanish, and Hindi. Performance will vary based on how well-resourced the language is.

• Global Standard
• US DataZone

{
  "model": "claude-opus-4-8",
  "max_tokens": 4096,
  "messages": [
    {
      "role": "user",
      "content": "Analyze this code for security vulnerabilities and suggest fixes."
    }
  ]
}

{
  "content": [
    {
      "text": "I'll analyze this code for security vulnerabilities...",
      "type": "text"
    }
  ],
  "id": "msg_example",
  "model": "claude-opus-4-8",
  "role": "assistant",
  "stop_reason": "end_turn",
  "type": "message",
  "usage": {
    "input_tokens": 42,
    "output_tokens": 256
  }
}

Please refer to the Claude Opus 4.8 System Card .