Glossary · term33 of 202
ccusage
A community tool that estimates API-equivalent dollar costs from Claude Code transcript files by converting logged token counts using published pricing.
Related terms
cache readA token served from a prior prompt's cached context instead of being processed fresh, billed at a fraction of the base input price. Most tokens in a long agent session are cache reads, not new context.view termcache writeThe cost of storing a prompt's context so later requests can read it from cache instead of reprocessing it. Billed above base input price, with the rate depending on how long the write stays valid.view termmessage_stop eventThe event in Claude Code's transcript format that would carry the final output token count for a response, but is never written, causing recorded output tokens to undercount actual billable output.view term
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- first used
- jul 2026
