| # Token Caching and Cost Optimization | |
| Qwen Code automatically optimizes API costs through token caching when using API key authentication (e.g., OpenAI-compatible providers). This feature reuses previous system instructions and context to reduce the number of tokens processed in subsequent requests. | |
| **Token caching is available for:** | |
| - API key users (Gemini API key) | |
| - Vertex AI users (with project and location setup) | |
| **Token caching is not available for:** | |
| - OAuth users (Google Personal/Enterprise accounts) - the Code Assist API does not support cached content creation at this time | |
| You can view your token usage and cached token savings using the `/stats` command. When cached tokens are available, they will be displayed in the stats output. | |