gpt-oss-120b
Open Source
About
OpenAI open-weight model with 120 billion parameters. Text-only model supporting reasoning, function calling, and structured outputs. Free for self-hosting. Released August 5, 2025.
Capabilities
MultimodalFunction CallingTool UseJSON Mode
Specifications
Released2025-08-05
Parameters120B
ArchitectureDecoder Only
Knowledge cutoff2025-08
Specializationgeneral