Show HN: Sunk Cost Calculates How Long a Local LLM Rig Takes to Beat Your API Bill
Hacker News (44pts, 88 comments)·low signal
Launched on HN on September 14, sunkcost.ai takes your machine specs or a preset, your electricity rate in dollars per kWh, current API pricing and your monthly bill or measured tokens per second, then returns a payback period and a leaderboard ranking local models against Claude and GPT. It includes an adjustable assumption for how fast API prices keep falling, which is the variable that actually decides most of these calculations. The tool surfaces 'best buys' as the quickest payback at each capability tier; 88 comments in its first ten hours suggests the answer surprised people.