# Response Synthesizer

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Response Synthesizer nodes are responsible for sending the query, nodes, and prompt templates to the LLM to generate a response. There are 4 modes for generating a response:

### Synthesizer Nodes:

* [Refine](https://tailwindsdocs.innovativesol.com/readme/chatflows/llamaindex/response-synthesizer/refine)
* [Compact and Refine](https://tailwindsdocs.innovativesol.com/readme/chatflows/llamaindex/response-synthesizer/compact-and-refine)
* [Simple Response Builder](https://tailwindsdocs.innovativesol.com/readme/chatflows/llamaindex/response-synthesizer/simple-response-builder)
* [Tree Summarize](https://tailwindsdocs.innovativesol.com/readme/chatflows/llamaindex/response-synthesizer/tree-summarize)