Today Anthropic introduces two tools to help agents built on Claude handle information better: context editing and the memory tool, combined with the new model Claude Sonnet 4.5.

These features aim to let agents run longer without losing important details or clogging the context window. Curious how that works in practice? Anthropic explains it here. (anthropic.com)

What changes for developers

The big struggle for agents today isn’t creativity — it’s working memory. When an agent runs many tasks and produces tool outputs, the context window fills up and you have to decide what to keep and what to discard.

With context editing, Anthropic automates that cleanup: it removes tool calls and results that are already stale as the token limit approaches, while keeping the conversational flow intact. That extends an agent’s useful life without you having to intervene manually. ()