Use case
Claude Opus 5.5 prompt caching
prompt caching notes for claude-opus-5-5: the rate card, a worked volume, and when to send this ID. A sample of 1 million input tokens plus 200 thousand output tokens is about $1.60 on corouter (input $0.800, output $0.800).
Cache-read rate
Cache read for claude-opus-5-5 lists at $0.200 and is $0.040 on corouter per million tokens. Uncached input is $0.800.
Only the input that actually hits cache is billed at the cache-read rate. This page does not promise your prompt will hit.
Where this ID sits
Claude Opus 5.5 is the lower Opus list rate in this catalog, with a cheaper cache read than Opus 5 and a Code tag. Send claude-opus-5-5 when you want that ID specifically.
Questions
- Which model ID should the request send?
- Send claude-opus-5-5. Do not put a different name in the model field.
- What is the minimum top-up?
- Prepaid credits, $5 minimum top-up, no subscription tier.