OpenAI: gpt-oss-20b

openai/gpt-oss-20b

Context: 131,072In: $0.02/1MOut: $0.09/1MUpdated 2026-10-04

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...