Context Window
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Cookie policy

LAST UPDATED SEPTEMBER 11, 2026

  • This site sets no cookie of its own. The analytics library sets one.

The analytics identifier

  • PostHog, the anonymous product analytics processor, stores an anonymous identifier in your browser, in a cookie and in local storage, so that two page views in one visit count as one visitor. It holds no name, no email address and nothing you typed, because there is nothing to type on this site.

What there is not

  • There is no sign-in cookie, no advertising cookie, no retargeting pixel and no ad network on the site.

Blocking it

  • Blocking cookies in your browser blocks it. The site reads the same without it.

When a lab changes a document

The engine refetches every registered document on a schedule and files the line that moved. Model cards, system cards, pricing pages, API changelogs and deprecation notices all change without an announcement. Leave an address and Context Window writes when one does.