gpt-oss-20b (free)
OpenAI
openai/gpt-oss-20b:freeGPT-OSS-20B is OpenAI's smaller open-weight model (around 20B parameters), designed to run on modest hardware for local or self-hosted reasoning and coding tasks. This is a free-tier variant of the model.
Cost rate
Free
Context
131K
Released
Aug 5, 2025
Input
Text
Output
Text
Support
ReasoningTool callingStructured outputs
Best at
The categories where this model ranks highest.