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openai/gpt-oss-120b%3Afree
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gpt-oss-120b (free)

gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized to run on a single H100 GPU with native MXFP4 quantization. The model supports configurable reasoning depth, full chain-of-thought access, and native tool use, including function calling, browsing, and structured output generation.

8/5/2025
131,072 tokens
Specifications

Modalities

Input
text
Output
text

Supported Parameters

include_reasoning
max_tokens
reasoning
seed
stop
temperature
tool_choice
tools

Max Output Tokens

131,072