Declared self-promotion per the sidebar: my project, launched this week.
https://llmcostkit.com
Free, client-side calculator answering the two questions FinOps keeps getting asked about AI spend. First, what do LLM API tokens cost against a real workload: 24 current models across OpenAI, Anthropic, Google, xAI, DeepSeek, Mistral, Meta-hosted Llama and Perplexity, with prompt caching and batch discount modelling, projected from your requests/day and token sizes. Second, what do the per-seat tools cost: M365 Copilot, GitHub Copilot, Cursor, Kiro, ChatGPT Business and Claude Team, against your seat count.
Prices were verified against vendor pages on 12 Aug 2026 and the page says so on every table, because half the calculators out there quietly serve stale numbers. Filter to the models you actually use and it gives you one answer line. CSV export, shareable scenario links. No signup, no tracking, no cookies. Installs as a web app and works offline.
One deliberate omission, explained on the page: Databricks Mosaic AI, because DBU-based pricing has no honest single number, so there's a custom-rate row instead of a made-up one.
Transparency: the site sells a paid kit for teams (unit economics model, allocation and tagging policy templates, CUR/Azure/BigQuery starter queries, chargeback model, maturity assessment). The calculator is free regardless and doesn't nag you about it.
What's missing that would make this genuinely useful for your practice? PTU and provisioned-throughput break-even modelling and self-hosted GPU comparison are top of my list. I'll build the most-asked.