Anthropic added Claude Sonnet 5.5 to its own page about limits, reading "1,000 | 2,000,000 | 400,000".

AnthropicLIMITSADDEDMON SEP 28, 18:20

The line, as the page carries it

+Claude Sonnet 5.5: "1,000 | 2,000,000 | 400,000"

The record

DOCUMENThttps://platform.claude.com/docs/en/api/rate-limits
SOURCEanthropic-rate-limits
ROWClaude Sonnet 5.5
OPERATIONadded
BEFORENothing was recorded because the row did not exist.
AFTER1,000 | 2,000,000 | 400,000
READ AT2026-09-28T18:20:04.923Z
SIGNALSmodelId, limit

What went out

    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.