← All models
AnthropicCurrent

Claude Opus 4.1

Most capable tasks — complex reasoning, research, and long-form writing

Context Window

200K tokens

≈ 150K words

Input Price

$15

per 1M tokens

Output Price

$75

per 1M tokens

Released

August 2025

Capabilities

Vision / Image inputTool / Function calling

Best for

Most capable tasks — complex reasoning, research, and long-form writing

Strengths

  • Deep reasoning
  • Agentic tasks
  • Research
  • Complex coding
  • Long-form writing

API identifier

claude-opus-4-1-20250805

Compare Claude Opus 4.1 side-by-side with any other model

Compare models →