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OpenAI: gpt-oss-120b

openai/gpt-oss-120b
Aug 5, 2025131.1K context$0.04/M in · $0.19/M outReasoning

Description

gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized to run on a single H100 GPU with native MXFP4 quantization. The model supports configurable reasoning depth, full chain-of-thought access, and native tool use, including function calling, browsing, and structured output generation.

Specifications

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

Pricing

TypePrice / 1M tokens
Input$0.04
Output$0.19

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-120b",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'