---
title: Claude Opus 4.6
description: Claude Opus 4.6 by Anthropic — most capable Claude model for complex reasoning and agentic tasks.
---

# Claude Opus 4.6

**Key:** `claude-opus-4-6`  
**Provider:** [Anthropic](/en/providers/anthropic/)  
**Support:** `runnable`

## Capabilities

chat · reasoning · tools

## Specifications

| Field | Value |
|-------|-------|
| Context window | 200 000 tokens |
| Input modalities | text |
| Output modalities | text |

## When to use

Anthropic's most capable model. Best for long-document analysis, multi-step reasoning chains that require careful thought, and complex agentic tasks where instruction-following fidelity is critical.

## Provider documentation

→ [Anthropic model overview](https://docs.anthropic.com/en/docs/about-claude/models/overview)
