What a Use AI column costs a row of this grid before the save, in credits: the draft's prompt rendered on the grid's first rows, read as tokens, priced per token for every model of the catalog, a range per model (the smallest row to the largest with a typical answer) and a ceiling (the largest row with the model's output cap). No writes, no charges. Use it to quote a column or to pick a model; the run charges each row its real price.

Contract:

• MCP tool estimate_playtable_field_ai_cost, registry package mcp.playtables/playtable_fields, mount playtables.columns.
• Operation action, response envelope action.
• Flags: read only.