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OpenAI: gpt-oss-20b (free)
gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...
openai/gpt-oss-20b:free
Context Size
131.072K
Input Price
Free
Output Price
Free
Architecture
Text
Supported Parameters
frequency_penaltyinclude_reasoningmax_tokensmin_ppresence_penaltyreasoningrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_atop_ktop_p
Details
TokenizerGPT
Max Completion32,768 tokens
Provider Context131.072K tokens
ModeratedNo
CreatedAug 5, 2025