Open Models Can Do 90% of Agentic Work at a Twentieth of the Cost of a Frontier LLM: Gartner
The Register, Tuesday, November 3rd, 2026
Gartner says open-weight models can handle 90% of agentic workflow steps at a fraction of frontier model cost and will run most of them by 2030.
Gartner analysts Mark Petty and Raymond Paquet argue that nine in ten agent workflow steps are routine tasks such as classification, tool calling and data validation, which open-weight models handle at parity.
They say an open model costs a quarter as much as the cheapest closed model at the same score and as little as a twentieth of a frontier model, though verbosity and retries put real savings closer to five or six times.
The analysts frame data control as the main benefit, warning that routine steps sent to frontier APIs move workflow history outside the perimeter.
Their planning assumption is that by 2030, 90% of enterprise operational agent workflow steps will execute on open-weight models, mostly domain-specific ones.