Run the audit

The audit reads an Excel (.xlsx), CSV or JSONL file of your own usage. Useful columns are the timestamp, the model id, input tokens and output tokens. Cost is optional. Parezen prices both sides from the versioned price book, so a missing cost does not block the estimate. From an Excel workbook the first sheet is read, with the header in its first non-empty row; date cells can stay formatted as dates.

• OpenAI. Usage export from the platform console, or the usage API, saved as CSV.
• Anthropic. Usage or cost export from the console.
• Google Gemini. Billing or usage export from the cloud workspace that owns the key.
• Other usage exports. The same four columns, from any provider or from a gateway you already run (LiteLLM, OpenRouter, Portkey).
• Or skip the file. Connect a read-only billing API instead: OpenAI Costs, Anthropic Usage and Cost, AWS Cost Explorer, Azure Cost Management or the Google Cloud billing export.

Console labels move. If a button has been renamed, export the same four columns under whatever name they use now.

Upload the file, or connect a connector, during sign up or later from Audits. The savings forecast report is an estimate: where the money goes and which changes are safe to make, with dollars at stake for each. It becomes a verified saving once a change runs on real traffic and the month's ledger matches your provider bill.