Model dossier

OpenAI: gpt-oss-20b

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...

ProviderOpenAI Start comparison

Context131,072

Max outputn/a

Pricing viewTVP price

Identity

OpenAI: gpt-oss-20b

Model ID: openai/gpt-oss-20b
Canonical slug: openai/gpt-oss-20b
Knowledge cutoff: 2024-06-30
Created: 8/5/2025

Capabilities

texttoolsstructured

Modalities

text->texttext

Capacity

Context131,072

Max outputn/a

TokenizerGPT