Glossary · term20 of 202
billed iteration
One individually charged request within a multi-step agent run, including hidden steps like compaction, that top-level usage summaries can omit entirely.
also written as billed iterations
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 termcompactionA billed request that reads an entire conversation history and replaces it with a shorter summary. The read itself counts as full input tokens, so compacting often costs more upfront than it saves unless the summary gets reused many times.view term
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- jul 2026
