Claude Sonnet 4.5 is a large-context AI model introduced in September 2026. With a context window up to 1 million tokens (beta) and improvements to coding, reasoning, memory management, and tool use, Sonnet 4.5 is especially suited for software development and autonomous agents.
The model is accessible through multiple channels—including IDE integrations, APIs, and web/mobile apps. This guide explores every possible way to use Claude Sonnet 4.5 and highlights free or trial options.

How to Install and Use Context7 MCP Server: The Ultimate Guide for Developers

Imagine this: You're coding with an AI assistant, but it keeps suggesting outdated methods or missing critical API updates. Frustrating, right? Enter Context7 MCP Server—a game-changing tool that delivers real-time documentation to supercharge AI-assisted coding. Let’s break down how to get it running and why developers are calling it "the missing link" in AI pair programming.