Skip to content

Glossary

Context window explained

The maximum tokens a model can consider at once, including your whole conversation.

Why it matters for cost

Crossing 200K (Claude/Gemini) or 272K (OpenAI) tokens moves the whole request to a premium tier.

How JP the Cat surfaces it

JP the Cat reads the real token counts behind this from the local logs on your Mac and prices them at the shipped rates — so it shows up in your actual cost, not an estimate.

Common questions

What is context window?
The maximum tokens a model can consider at once, including your whole conversation.
How does it change what I pay?
Crossing 200K (Claude/Gemini) or 272K (OpenAI) tokens moves the whole request to a premium tier.