Use case
Claude Sonnet 4.6 prompt caching
prompt caching notes for claude-sonnet-4-6: 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 $1.20 on corouter (input $0.600, output $0.600).
Cache-read rate
Cache read for claude-sonnet-4-6 lists at $0.300 and is $0.060 on corouter per million tokens. Uncached input is $0.600.
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 Sonnet 4.6 keeps the previous Sonnet list rate, above Sonnet 5, with a 1M window and the Code tag. Send claude-sonnet-4-6 when a runbook still names it.
Questions
- Which model ID should the request send?
- Send claude-sonnet-4-6. 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.