> ## Documentation Index > Fetch the complete documentation index at: https://docs.cognigy.com/llms.txt > Use this file to discover all available pages before exploring further. # All LLM Providers To add a standard or custom model, select a large language model (LLM) provider integrated with Cognigy.AI: Cognigy.AI provides a GPT-based LLM for setting up and testing [design-time features](/ai/agents/develop/gen-ai-and-llms/generative-ai#design-time-generative-ai-features). Add credentials for standard models, such as `gpt-5-4`, `gpt-5-2`, `gpt-5-1`, `gpt-5`, and `text-embedding`, or add a custom model based on an Azure OpenAI model. Add credentials for standard models, such as `gpt-5-4`, `gpt-5-2`, `gpt-5-1`, `gpt-5`, and `text-embedding`, or add a custom model based on an OpenAI model. Add credentials for models from any provider that adheres to the OpenAI API standards, including Hugging Face, DeepSeek, xAI, Fireworks AI, and others. Add credentials for standard models, such as `claude-sonnet-4-6`, `claude-sonnet-4-5`, `claude-haiku-4-5`, and `claude-opus-4-0`, or add a custom model based on an Anthropic model. Add a custom model based on a model from the Vertex AI family. Add credentials for standard models, such as `gemini-2.5-pro`, `gemini-2.5-flash`, and `gemini-2.5-flash-lite`, or add a custom model based on a model from the Gemini family. Add credentials for standard models, such as `gemini-3.1-pro-preview`, `gemini-3-flash-preview`, and `gemini-3.1-flash-lite-preview`. Add credentials for standard models, such as `luminous` and `luminous-embedding-128`, or add a custom model based on an Aleph Alpha model. Add credentials for standard models or add a custom model based on any Amazon Bedrock model that supports the [Converse API](https://docs.aws.amazon.com/bedrock/latest/userguide/models-features.html). Add credentials for standard models, such as `pixtral-12b-2409`, `mistral-large-latest`, and `mistral-medium-latest`, or add a custom model based on a Mistral AI model. Cognigy Nexus LLM is a proprietary LLM, provided and hosted by Cognigy, optimized for AI-driven customer service. *** 1: The platform-provided LLM is available only to customers with SaaS installations.