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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