Using gpt-oss-120b on Together AI

Implementation guide · GPT-OSS · OpenAI

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Together AI exposes gpt-oss-120b through model ID openai/gpt-oss-120b. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-15. Next refresh: weekly.

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 openai/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.
API PortalDocumentationPricingModel Card

Code Examples

Install
pip install together
API key
TOGETHER_API_KEY
Model ID
openai/gpt-oss-120b

Together uses "organization/model-name" format, e.g. "meta-llama/Llama-4-Scout-17B-16E-Instruct" or "Qwen/QwQ-32B". See the Together model catalog for the exact ID.

from together import Together

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

Pricing on Together AI

TypePrice (per 1M)
Input tokens$0.15
Output tokens$0.60

Capabilities

JSON / Tool useStructured Outputs

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.

Full model details →

Model Specs

Released2025-08-05
Parameters120B
Context131k
ArchitectureDecoder Only
Knowledge cutoff2025-08

Also available on(12)

Open InferenceFree/1MOpenRouter$0.04/1MNovita AI$0.05/1M
Compare all providers →

Provider

Together AI

San Francisco, California, United States