---
title: "Claude Opus 4.1 — LLM profile"
provider: "Anthropic"
version: "4.1"
model_type: "llm"
context_window: "200000"
parameters: "312B"
release_date: "2025-04-15"
url: "https://lforla.org/models/claude-opus-4-1"
markdown_twin: "https://lforla.org/markdown/models/claude-opus-4-1.md"
---
# Claude Opus 4.1

Anthropic's frontier flagship model for complex reasoning and agentic workflows.