How to Use Runway With AI Cost Shock
Reverse-engineers cash on hand from current runway × current burn, replaces the AI line with a shocked figure, and computes new runway plus break-even revenue and months-to-break-even at compound growth.
Bottom Line
Recompute runway after an LLM vendor price shock and report the revenue trajectory required to recover. Backs cash on hand out of current runway times burn, replaces the AI line with a shocked figure, then outputs new runway alongside the monthly compound growth rate needed to break even before runway zero.
Runway With AI Cost Shock
Stress-test runway against an LLM vendor price hike with break-even revenue trajectory.
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What It Does
Use the calculator with intent
Reverse-engineers cash on hand from current runway × current burn, replaces the AI line with a shocked figure, and computes new runway plus break-even revenue and months-to-break-even at compound growth.
Founders and CFOs planning for vendor risk, especially after recent LLM provider price moves.
Interpreting Results
If new runway is below 12 months and break-even is more than 18 months out, you need a hedge — multi-vendor, prompt caching, or a cheaper model tier.
Input Steps
Field by field
- 1
Current Runway in Months
Months of runway today, used to back out cash.
- 2
Current Monthly AI Cost
Current LLM-vendor line item.
- 3
Total Monthly Burn
Total monthly burn including AI cost. Validated to be ≥ AI cost.
- 4
AI Price Shock Percent
Percent increase to model. Use 50% as a base case, 100% as a stress case.
Negative values let you stress-test a price drop too.
- 5
Assumed Monthly Revenue Growth
Compound monthly growth used to compute months-to-break-even.
Common Scenarios
Use realistic starting points
Modest 25% shock
AI price shock
25
Runway barely shifts when AI is < 10% of burn.
Doomsday 100%
AI price shock
100
If AI is 30%+ of burn, runway shortens by months.
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Questions people ask next
The short answers readers usually want after the first pass.
Sources & References
- Carta — State of Private Markets 2024 — Carta
- SaaS Capital Annual Survey 2024 — SaaS Capital
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