
LangChain's Deep Agents v0.7 Cuts Token Use by 65% With Leaner Prompts
LangChain released Deep Agents v0.7 on July 29, 2026, an open-source agent harness update that cuts base input tokens by 65% on a default-agent turn, from roughly 6,000 to about 2,000 tokens. The release trims the built-in prompt, shortens tool descriptions, and makes the todo list middleware optional. It also adds middleware configurability and filesystem improvements that users have requested for months.
