Free LLM cost calculator – what your AI product costs across providers Posted by eka_aibuilder on Sunday March 15, 2026 @03:07PM from the ai-cost-audit.vercel.app dept. https://ai-cost-audit.vercel.app ( 2 comments | on HN )
Common story: founder builds a chatbot on GPT-4o, gets an $8,400 bill, then realizes Gemini Flash does the same job for $1,350.
The calculator shows instant cost breakdown across 9 providers with a scaling simulator (what happens at 10K users).
Also built an automated AI Cost Report (€299) — personalized architecture review + routing strategy, generated in under 5 min.
Would love feedback on what's useful.