GPT-OSS
Aug 2025 License: Apache 2.0
OpenAI's open-weight family for local reasoning and agents, with tool use, function calling, and adjustable reasoning effort.
Sizes
| GPT-OSS 20B mxfp4 requires 24 GB+ memory | 12.1 GB | |
| GPT-OSS 120B mxfp4 requires 96 GB+ memory | 63.4 GB |