Add cached input pricing support in cost calculations. Closes #1582#1613
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waldekmastykarz wants to merge 2 commits intodotnet:mainfrom
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Add cached input pricing support in cost calculations. Closes #1582#1613waldekmastykarz wants to merge 2 commits intodotnet:mainfrom
waldekmastykarz wants to merge 2 commits intodotnet:mainfrom
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Pull request overview
Adds support for cache-aware OpenAI token pricing so cost calculations can account for cached prompt tokens separately from regular prompt tokens, aligning Dev Proxy telemetry/reporting with OpenAI’s cached-token billing model.
Changes:
- Extends pricing data model to include
CachedInputand updates cost calculation API to accept cached input token counts. - Updates OpenAI telemetry cost calculation to pass cached token usage into pricing calculations.
- Enhances language model pricing loader to read optional
cached_inputpricing from the prices JSON.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| DevProxy.Plugins/Inspection/OpenAITelemetryPlugin.cs | Passes cached prompt token counts into pricing cost calculation for telemetry and reporting. |
| DevProxy.Plugins/Inspection/LanguageModelPricingLoader.cs | Loads optional cached_input price per model from pricing JSON data. |
| DevProxy.Abstractions/LanguageModel/PricesData.cs | Adds cached input price field and updates cost calculation logic/signature to account for cached tokens. |
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Add cached input pricing support in cost calculations. Closes #1582