OpenAI: gpt-oss-120b (free)

openai/gpt-oss-120b:free

Tool useReasoningStreaming

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...

Specs

Context

131,072 tokens

Input

text

Output

text

Knowledge cutoff: 2024-06-30

Released: 2025-08

Supported parameters

include_reasoningmax_tokensreasoningseedstoptemperaturetool_choicetools

Open weights · HuggingFace

4,665,128 downloads/mo

4,829 likes

apache-2.0 text-generation

arXiv:2508.10925

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