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backend/resources/model-pricing/README.md

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+# Model Pricing Data
+
+This directory contains a local copy of the mirrored model pricing data as a fallback mechanism.
+
+## Source
+The original file is maintained by the LiteLLM project and mirrored into the `price-mirror` branch of this repository via GitHub Actions:
+- Mirror branch (configurable via `PRICE_MIRROR_REPO`): https://raw.githubusercontent.com/<your-repo>/price-mirror/model_prices_and_context_window.json
+- Upstream source: https://raw.githubusercontent.com/BerriAI/litellm/main/model_prices_and_context_window.json
+
+## Purpose
+This local copy serves as a fallback when the remote file cannot be downloaded due to:
+- Network restrictions
+- Firewall rules
+- DNS resolution issues
+- GitHub being blocked in certain regions
+- Docker container network limitations
+
+## Update Process
+The pricingService will:
+1. First attempt to download the latest version from GitHub
+2. If download fails, use this local copy as fallback
+3. Log a warning when using the fallback file
+
+## Manual Update
+To manually update this file with the latest pricing data (if automation is unavailable):
+```bash
+curl -s https://raw.githubusercontent.com/BerriAI/litellm/main/model_prices_and_context_window.json -o model_prices_and_context_window.json
+```
+
+## File Format
+The file contains JSON data with model pricing information including:
+- Model names and identifiers
+- Input/output token costs
+- Context window sizes
+- Model capabilities
+
+Last updated: 2025-08-10