Dev Ships Free LLM Cost Calculator Pulling Live OpenRouter Pricing for 250+ Models

zackku · reddit · 2026-10-21

Tired of stale spreadsheet math, a developer built ModelAnalysis.si, a free no-signup calculator that pulls live pricing and context windows for 250+ models from the OpenRouter API. Enter monthly input/output token volume to project bills, adjust a prompt caching slider (critical for RAG/agent workloads), and get a rough breakeven estimate for self-hosting open-weight models on rented GPUs vs paying per token. Caveats: OpenRouter prices may differ from direct provider billing, and cache write fees/TTL quirks aren't fully modeled yet.

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