Open formula. Browser-based calculations. Source-dated rates. No API keys. No provider login. No tracing SDK. No account required. Input payloads are not stored.
Pricing source date: 2026-05-28 · Build verification: 2026-05-28 · Stale threshold: 30 days. Provider pricing table reviewed 2026-05-28: OpenAI (GPT-5.5 / GPT-5.4 / o3), Anthropic (added Opus 4.8), and Google Gemini (3.x family) rows refreshed from official sources. Other rows carried from prior review — re-verify with each provider before contracts, production commitments, or budget approvals.
Model Ruler estimates AI architecture cost from user-provided assumptions: token volume, calls, context growth, cache behavior, retries, tool calls, automation-platform units, eval runs, observability volume, and self-host utilization.
Use these estimates for planning. Verify current provider rates and infrastructure terms before contracts or production commitments.