> ## Documentation Index > Fetch the complete documentation index at: https://docs.siray.ai/llms.txt > Use this file to discover all available pages before exploring further. # GPT oss 20b > OpenAI's GPT oss 20B is an Open-Weight MoE LLM designed for on-device use, offering strong reasoning, function calling, and agentic capabilities under the Apache 2.0 license. ### Model Use Cases An Open-Weight MoE LLM released under the Apache 2.0 license. It is designed for efficient, low-latency reasoning and deployment on single-GPU hardware. ### Key Features * **Open-Weight:** Available for unrestricted commercial and non-commercial use under the Apache 2.0 license. * **Efficient MoE:** Utilizes a Mixture-of-Experts architecture for strong performance with low latency. * **On-Device Ready:** Optimized for efficient deployment and inference on single-GPU hardware configurations.