Fathom Layer / Decision instruments
AI calculators.
Run the numbers.
Estimate model memory, cloud versus local costs, prompt spending and vector storage. Change the inputs and see where your decision changes.
Estimates, not quotes. Every input stays editable.
01 / Find your question
Choose the constraint.
Each instrument solves a different part of a technology decision. Start with the uncertainty in front of you.
02 / Workbench
Change an input.
Watch the answer move.
Use a starting scenario or build your own. Results update as you adjust the controls; the underlying assumptions remain visible.
What happens at scale?
Keep a reference. Change one input.
Hold the current estimate, then adjust the controls. Compare how the modeled result changes; the reference stays separate for each instrument.
Lowest modeled cost
Across recorded rates · not a quality recommendation
Prompt text stays in this browser; only the numeric count is shared. Characters divided by four is a rough English heuristic.
Cost Matrix (Sorted)
Results depend on the entered assumptions. Recorded prices and modeled memory are not live quotes or measured deployment results.
Keep your inputs in view as you inspect the next part of the decision.
Numeric token counts and request volume carry over. Prompt text stays in this browser.
03 / Starting points
Begin with a real question.
These are editable example inputs. They are not measurements of a deployed system or current vendor quotes.
04 / Read the result
A number is only as useful
as its assumptions.
These calculators model a scenario. Memory estimates include model weights, context cache and overhead; cost estimates depend on the workload and rate values shown in the tool. Actual hardware behavior, provider terms and deployment costs may differ.