---
title: "Claude Sonnet 4.5 — LLM profile"
provider: "Anthropic"
version: "4.5"
model_type: "llm"
context_window: "200000"
parameters: "105B"
release_date: "2025-05-15"
url: "https://lforla.org/models/claude-sonnet-4-5"
markdown_twin: "https://lforla.org/markdown/models/claude-sonnet-4-5.md"
---
# Claude Sonnet 4.5

High-performance mid-tier model balancing intelligence, speed and cost.