Claude Opus 4.8

Claude Opus 4.8 is Anthropic's most capable model, built for the most demanding reasoning and agentic work. It combines deep, deliberate analysis with strong instruction following, so it can plan, reason through many steps, and carry long, complex tasks through to completion without losing the thread.

The model excels at software engineering, multi-file coding, and long-horizon agent workflows, as well as rigorous analysis across technical and scientific domains. It sustains context and intent across extended interactions, making it well suited to work that other models struggle to hold together.

With a large context window and dependable structured output, Opus 4.8 is designed to sit at the centre of high-stakes automations where accuracy matters more than raw speed. It integrates through the same API and tooling as the rest of the Claude family, so you can route only your hardest tasks to it.

• Deep Reasoning: Deliberate, multi-step analysis for the hardest problems.
• Agentic Workflows: Plans and executes long-horizon, tool-using tasks.
• Advanced Coding: Strong multi-file software engineering and debugging.
• Long Context: Holds intent and detail across extended interactions.