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Usage is metered in credits, drawn from the same balance as the Visk app — your plan’s monthly allowance plus any top-ups. Manage your plan at visk.com. Credits are charged per slide: what a session costs comes down to how many slides you write and how many you read. New accounts get 200 credits free, enough to build around 100 slides. Charges never stack. A slide is billed at the highest tier you touch, so reading a slide and then editing it costs 2 credits in total, not 3. Opening a presentation is free: the agent receives a markdown summary of every slide as grounding, so it can orient itself across a large deck and charge you only for the slides it actually works on. Cost formula for a deck:

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What a credit costs

There are two ways to get credits:
  • A subscription grants a monthly allowance that refreshes each billing period.
  • Credit packs are one-off top-ups, including your signup grant and any bundles you buy.
Current plan and pack prices are on visk.com — a 10-slide deck costs 20 credits, roughly $0.50 on a subscription.

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Worked examples

  • A session is one continuous editing session on the same presentation, lasting up to 24 hours. Reads and writes are charged once per slide within it.
  • Failed calls are never charged. Charges apply only when an operation succeeds.
  • Running out of credits blocks further reads and writes, but you can still export the deck you have.