Costs #

Cost is reported, estimated or unknown. A provider's reported zero is zero; missing cost is unknown. Reported cost takes precedence over an estimate, which stays in the signed receipt for comparison.

Estimates #

Direct OpenAI and Anthropic calls can use the embedded LiteLLM table. Tabslip looks up the reported model first, then the requested model. If neither matches, it tries names without a date suffix. It only uses prices listed for that provider. The receipt records the table version even when lookup misses. OpenRouter, Ollama and custom upstreams have no price-table estimates; they need reported cost.

OpenAI cached input is subtracted from ordinary input and charged once. Reasoning tokens are already part of output. Anthropic signed input is the uncached count. Cache reads and writes use their own rates; one-hour writes are part of total writes, never an extra category to add twice. Missing cache rates fall back to the applicable ordinary or cache-write rate. Embeddings use input alone. Missing required usage or prices leave the estimate unknown. Calculations use exact decimals, rounded half-up to twelve fractional digits.

OpenRouter generation details arrive as a separate signed supplement. Its cost and non-null provider can replace the displayed summary, while the signed base receipt stays unchanged. Spend and unsigned exports count that cost once. Totals show reported and estimated subtotals and the number of calls with unknown cost. A group with only unknown costs displays unknown. Spend date windows use UTC midnight.

Price tables #

Replace ./instance-data with your instance's data directory:

tabslip prices --data-dir ./instance-data
tabslip prices update --data-dir ./instance-data --dry-run

The first command shows the selected table's date and SHA-256. The second previews an update without a download or file change. To download explicitly, remove --dry-run. The source is LiteLLM's model_prices_and_context_window.json on its main branch. Tabslip checks the downloaded prices before replacing the saved table. A failed update keeps the old table. Restart the gateway to load it. A running gateway retains its startup table, and already signed costs never change. Demo mode always uses embedded prices.

The embedded snapshot comes from LiteLLM revision 4818b767d8b4c4e5fa9885ab953d6f5cfe7c7ca5. Developers can reproduce it with go generate ./internal/prices, which downloads that pinned revision. See prices commands and receipt fields.