> For the complete documentation index, see [llms.txt](https://docs.parasail.io/parasail-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parasail.io/parasail-docs/guides.md).

# Guides

- [Chat Completions](https://docs.parasail.io/parasail-docs/guides/chat-completions.md): Send chat messages to instruct-tuned models with Parasail's OpenAI-compatible Chat Completions API.
- [RAG](https://docs.parasail.io/parasail-docs/guides/rag.md): Build Retrieval-Augmented Generation systems that combine embeddings, vector retrieval, and LLM generation on Parasail.
- [Multi-Modal](https://docs.parasail.io/parasail-docs/guides/multi-modal.md): Send images to vision-language models like Qwen2.5-VL using base64 data URLs through Parasail's OpenAI-compatible API.
- [Structured Output](https://docs.parasail.io/parasail-docs/guides/structured-output.md): Get reliable, schema-conformant JSON from Parasail models using guided\_json and response\_format.
- [Tool/Function Calling](https://docs.parasail.io/parasail-docs/guides/tool-function-calling.md): Let Parasail models call your functions and tools via the Chat Completions and Responses APIs.
- [Model Selection](https://docs.parasail.io/parasail-docs/guides/model-recommendations.md): Choose Parasail models by capability, deployment tier, latency, cost, and validation workflow instead of relying on stale static rankings.