OpenAI: gpt-oss-20b (free)

openai/gpt-oss-20b:free

Context: 131,072In: $0.00/1MOut: $0.00/1MUpdated 2026-08-21

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...