> For the complete documentation index, see [llms.txt](https://metaverse-imagen.gitbook.io/ai-tools-research/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://metaverse-imagen.gitbook.io/ai-tools-research/large-language-models-llms/openai.md).

# OpenAI

- [ChatGPT-4 (OpenAi)](https://metaverse-imagen.gitbook.io/ai-tools-research/large-language-models-llms/openai/chatgpt-4-openai.md)
- [Is GPT-4 Open Source?](https://metaverse-imagen.gitbook.io/ai-tools-research/large-language-models-llms/openai/chatgpt-4-openai/is-gpt-4-open-source.md)
- [ChatGPT can now See, Hear, and Speak](https://metaverse-imagen.gitbook.io/ai-tools-research/large-language-models-llms/openai/chatgpt-4-openai/chatgpt-can-now-see-hear-and-speak.md)
- [ChatGPT-4 Turbo, Custom GPTs and AI Agents](https://metaverse-imagen.gitbook.io/ai-tools-research/large-language-models-llms/openai/chatgpt-4-turbo-custom-gpts-and-ai-agents.md)