Category
Fundamentals
Tokens, pricing models, context windows — the building blocks of every AI API bill.
When Is a Reasoning Model Worth Its API Cost?
A practical test for reasoning models: measure correct outcomes, token use and retries on your own tasks.
May 29, 2026
Context Windows and API Cost: What You Actually Pay
Separate a model's maximum context capacity from the number of tokens you send and pay for.
May 22, 2026
Tokens to Dollars: Calculate an AI API Request
A worked input and output token calculation, with the billing categories that a simple token converter cannot include.
May 18, 2026
What Are AI Tokens? A Practical Guide for API Users
Understand token units, why word counts vary, and where token counts appear in a real API bill.
May 10, 2026
How Many Tokens Are in 1,000 Words?
Use a rough English planning range, then measure tokens with the target model before relying on a cost estimate.
February 5, 2026
How AI API Pricing Works: Read a Model Price Sheet
Learn to read per-million-token rates, identify separate billing categories and turn usage records into a monthly forecast.
January 20, 2026