Calculate, compare, plan.
Practical tools that answer the real questions you face when shipping AI products — built on real model data.
Tokens & Cost
Token Calculator
Estimate how many tokens your text uses, and how much of a model's context window it fills.
OpenChat Cost Calculator
Estimate the monthly cost of your usage by model and token flow.
OpenContext Window Comparator
Paste your text → see which models' windows it fits, which overflow.
OpenModel Choice
Hardware & Production
Training
Model data current as of May 2026 — prices in USD / 1M tokens.