GPT-OSS
Aug 2025
OpenAI's first open-weight models since GPT-2. Built for reasoning, agentic tasks, and developer use with function calling and tool use capabilities.
Sizes
| GPT-OSS 20B mxfp4 requires 24 GB+ memory | 12.1 GB | |
| GPT-OSS 120B mxfp4 requires 96 GB+ memory | 63.4 GB |