ROI calculator
projectionWhat Ganvil is worth on your plan.
Ganvil is $20/mo and cuts the input Claude reads by about 4× on agentic gather. Set your plan and how input-heavy your work is — the cards recompute live. This is a projection built on the measured ~75% input cut; your savings dashboard shows the real per-month number.
At $200/mo that's $130 input + $70 output.
A · same work, smaller bill
$78/mo
saved · 39% off
Frontier bill: $200 → $103
+ $20 Ganvil = $123 all-in
B · extend the plan
the one$370/mo
surplus · 2.7× return · ~3.0× the work
$130 input × 4.0× = $520 capacity
+ $70 output = $590 of frontier work
for $220 all-in ($200 + $20)
How it's computed. Input $ = plan × input-share; output $ = the rest. A: input tokens cost ¼ as much, output unchanged, plus $20. B: keep the same bill; the input you'd have had to buy is worth 4.0× more, valued as frontier capacity. All are projections — the 4× input cut is measured, the dollar translation depends on your workload and how your plan meters usage.
Caching caveat: on Claude Max, repeated context caches for up to an hour (reads ~0.1× and don't count toward your rate limit), so treat the input-side dollars as an upper bound for cache-heavy sessions. Ganvil's durable win is on cache writes, misses, dynamic gather, and output (never cached) — and its deterministic output raises your cache hit rate.