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OpenAI: gpt-oss-20b
openai/gpt-oss-20b
Tool useReasoningStreaming
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...
Pricing
Input
$0.029 / 1M
Output
$0.14 / 1M
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
8,001,850 downloads/mo
4,655 likes
apache-2.0 text-generation