Terminus-4B: Can a Smaller Model Replace Frontier LLMs at Agentic Execution Tasks?

ArXi:2605.03195v1 Announce Type: new Modern coding agents increasingly delegate specialized subtasks to subagents, which are smaller, focused agentic loops that handle narrow responsibilities like search, debugging or terminal execution. This architectural pattern keeps the main agent's context window clean by isolating verbose outputs (e.g. build logs, test results, etc.) within the subagent context. Typically when agents employ subagents for such tasks, they use frontier models as these subagents.