Anthropic Makes 'Sonnet 4.5', Its Latest Coding Model, Available This Week

IBL News | New York

Anthropic, the owner of the chatbot Claude, made its latest coding model, Sonnet 4.5, available this week. Developers can use the Claude API.

The tool includes checkpoints, a feature that allows users to save progress and roll back instantly to a previous state. The company reports substantial gains in reasoning and math.

Anthropic explained:

• “We’ve refreshed the terminal interface and shipped a native VS Code extension. We’ve added a new context editing feature and memory tool to the Claude API that lets agents run even longer and handle even greater complexity.”

• “In the Claude apps, we’ve brought code execution and file creation (spreadsheets, slides, and documents) directly into the conversation.”

• “We have made the Claude for Chrome extension available to Max users who joined the waitlist last month.”

• “We’re also giving developers the building blocks we use ourselves to make Claude Code. We’re calling this the Claude Agent SDK. The infrastructure that powers our frontier products—and allows them to reach their full potential—is now yours to build with.”