Using gpt-oss-120b on Together AI

Quick Start

1. 1
   Create an account at Together AI and generate an API key.
2. 2
   Use the Together AI SDK or REST API to call gpt-oss-120b — see the documentation for request format.
3. 3
   You'll be billed $0.15/1M input, $0.60/1M output tokens. See full pricing.

Code Examples

from together import Together

client = Together()  # reads TOGETHER_API_KEY from env
response = client.chat.completions.create(
    model="gpt-oss-120b",
    messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)

About Together AI

Platform for running open-source and proprietary LLMs

Together AI is a platform for running open-source and proprietary LLMs with fast serverless and dedicated endpoints at competitive inference pricing.

Pricing on Together AI

Capabilities

About gpt-oss-120b

OpenAI open-weight model with 120 billion parameters. Text-only model supporting reasoning, function calling, and structured outputs. Free for self-hosting. Released August 5, 2025.