# OpenAI: gpt-oss-20b

Provider: openai  
Category: llm  
Model ID: `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...

## Specs

- Context length: 131072 tokens
- Max output: unknown tokens
- Modalities: text
- Released: 2025-08-05

## Pricing

- Input: $0.03 per million tokens
- Output: $0.14 per million tokens

## Providers

- **openai** — ctx 131072, input $0.03/M, output $0.14/M

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Last verified: 2026-04-23T23:46:29.618Z  
Canonical URL: https://switchy.build/models/gpt-oss-20b