> ## Documentation Index
> Fetch the complete documentation index at: https://docs.portkey.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Multimodal Capabilities

The Gateway is your unified interface for **multimodal models**, along with chat, text, and embedding models.

Using the Gateway, you can call `vision`, `audio (text-to-speech & speech-to-text)`, `image generation` and other multimodal models from multiple providers (like `OpenAI`, `Anthropic`, `Stability AI`, etc.) — all using the familiar OpenAI signature.

#### Explore the AI Gateway's Multimodal capabilities below:

> [card] [Vision](https://docs.portkey.ai/docs/aigw/product/ai-gateway/multimodal-capabilities/vision.md)

> [card] [Image Generation](https://docs.portkey.ai/docs/aigw/product/ai-gateway/multimodal-capabilities/image-generation.md)

> [card] [Function Calling](https://docs.portkey.ai/docs/aigw/product/ai-gateway/multimodal-capabilities/function-calling.md)

> [card] [Speech-to-Text](https://docs.portkey.ai/docs/aigw/product/ai-gateway/multimodal-capabilities/speech-to-text.md)

> [card] [Text-to-Speech](https://docs.portkey.ai/docs/aigw/product/ai-gateway/multimodal-capabilities/text-to-speech.md)


## Related topics

- [Universal API](https://docs.portkey.ai/docs/aigw/product/ai-gateway/universal-api.md)
- [Google Gemini](https://docs.portkey.ai/docs/aigw/integrations/llms/gemini.md)
- [Features](https://docs.portkey.ai/docs/aigw/introduction/feature-overview.md)
- [Supported Endpoints & Capabilities](https://docs.portkey.ai/docs/aigw/product/guardrails/capabilities.md)
- [Image Generation](https://docs.portkey.ai/docs/aigw/product/ai-gateway/multimodal-capabilities/image-generation.md)


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