GPT OSS 120B 1 API Pricing

GPT OSS 120B 1 pricing by provider

4 listings across 1 provider. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

What GPT OSS 120B 1 costs in practice

1,000 requests with 2,000 input and 500 output tokens each

100 long-document requests with 100,000 input and 2,000 output tokens each

GPT OSS 120B 1 features

• Function calling
• Structured output
• Reasoning

Use GPT OSS 120B 1 with LiteLLM

Call GPT OSS 120B 1 through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/chat/completions. LiteLLM tracks the cost of every request at these prices.

from litellm import completion

response = completion(
    model="openai.gpt-oss-120b-1:0",
    messages=[{"role": "user", "content": "Hello!"}],
)

model_list:
  - model_name: gpt-oss-120b-1
    litellm_params:
      model: openai.gpt-oss-120b-1:0
      aws_region_name: os.environ/AWS_REGION_NAME

curl http://0.0.0.0:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-1234" \
  -d '{
    "model": "gpt-oss-120b-1",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

GPT OSS 120B 1 FAQ

More OpenAI models

• GPT OSS 120B Turbo$0.15 / $0.60 per 1M tokens
• GPT OSS 120B Ultra$0.20 / $0.95 per 1M tokens
• GPT OSS Safeguard 120B$0.15 / $0.60 per 1M tokens
• GPT OSS Safeguard 20B$0.07 / $0.20 per 1M tokens
• GPT OSSFree
• GPT OSS 120B MxfpFree
• GPT OSS 20B Mxfp4Free
• GPT OSS 120B$0.03 / $0.17 per 1M tokens