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OpenAI: gpt-oss-20b

openai/gpt-oss-20b
Aug 5, 2025131.1K context131.1K max output$0.03/M in · $0.14/M outReasoning

Description

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 lower-latency inference and deployability on consumer or single-GPU hardware. The model is trained in OpenAI’s Harmony response format and supports reasoning level configuration, fine-tuning, and agentic capabilities including function calling, tool use, and structured outputs.

Specifications

Provider
openai
Context Length
131.1K
Max Output
131.1K
Modality
Intext
Outtext

Pricing

TypePrice / 1M tokens
Input$0.03
Output$0.14

Quick Start

curl https://api.ominigate.ai/v1/chat/completions \
  -H "Authorization: Bearer sk-omg-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-oss-20b",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
OpenAI: gpt-oss-20b — Pricing & API on OminiGate