gpt-oss-120b

Text Generation · OpenAI · Hosted

gpt-oss-120b

OpenAI's open-weight models designed for powerful reasoning, agentic tasks, and versatile developer use cases – gpt-oss-120b is for production, general purpose, high reasoning use-cases.

Function callingReasoning

Model Info

Task Type

Text Generation

Author

OpenAI

Endpoint

/api/v1/chat/completions

Terms and License

Not listed

Function calling

Yes

Reasoning

Yes

Vision

Unit Pricing

$0.35 per M input tokens, $0.75 per M output tokens

Playground

Try this model

Use the marketplace playground with this public slug.

Open Playground

Usage

curl

curl https://devix.one/api/v1/chat/completions \
  -H "Authorization: Bearer mak_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gpt-oss-120b",
  "messages": [
    {
      "role": "user",
      "content": "Explain this model in one sentence."
    }
  ],
  "max_tokens": 256
}'

Parameters

Request Body

{
  "model": "gpt-oss-120b",
  "messages": [
    {
      "role": "user",
      "content": "Explain this model in one sentence."
    }
  ],
  "max_tokens": 256
}

Response

Text models return OpenAI-compatible chat completions. Image models return data[0].url. Other model types return a normalized result object.

Internal credentials and routing fields are never exposed here.

API Schemas (Raw)

json

{
  "model": "string",
  "messages": [
    {
      "role": "system | user | assistant",
      "content": "string"
    }
  ],
  "max_tokens": "number | optional",
  "stream": "boolean | optional"
}