agent-swarm.dev is open source/MIT exactly meant for these scenarios.

Particularly interesting for you, our lasts posts on how we handle to have efficient dreaming focused on reducing costs.

tl;dr: there's a self-driven process generating more effective and efficient prompts, code, and potentially select systemone models to tackle the cost problems.

We have companies using the system that we understand have stayed 'flat' in token consumption but with increasing workloads (ie. more workflows running).

Hope it helps!