# Specifications

Configure LLM models, embeddings, and custom specifications for workflows and conversations.

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## Model Configuration

* [Create Custom Model](https://docs.graphlit.dev/api-guides/use-cases/specifications/specification-create-custom-model) - GPT-4, Claude, Gemini
* [Create OpenAI-Compatible Gateway](https://docs.graphlit.dev/api-guides/use-cases/specifications/specification-create-openai-compatible) - 🌐 OpenRouter, Vercel AI Gateway
* [Create Completion Spec](https://docs.graphlit.dev/api-guides/use-cases/specifications/specification-create-completion) - LLM configuration
* [Create Embedding Model](https://docs.graphlit.dev/api-guides/use-cases/specifications/specification-create-embedding) - Text embeddings config

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## Operations

* [Query Specifications](https://docs.graphlit.dev/api-guides/use-cases/specifications/specification-query) - List and filter
* [Update Specification](https://docs.graphlit.dev/api-guides/use-cases/specifications/specification-update) - Modify settings
* [Delete Specification](https://docs.graphlit.dev/api-guides/use-cases/specifications/specification-delete) - Remove spec

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