Pricing/OpenAI GPT OSS 120B
OpenAI

OpenAI GPT OSS 120B

openai/gpt-oss-120b
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.

Features

Serverless API

Docs

openai/gpt-oss-120b is available via Novita's serverless API, where you pay per token. There are several ways to call the API, including OpenAI-compatible endpoints with exceptional reasoning performance.

On-demand Deployments

Docs

On-demand deployments allow you to use openai/gpt-oss-120b on dedicated GPUs with high-performance serving stack with high reliability and no rate limits.

Available Serverless

Run queries immediately, pay only for usage

Input$0.05 / M Tokens
Output$0.25 / M Tokens

Use the following code examples to integrate with our API:

1from openai import OpenAI
2
3client = OpenAI(
4    api_key="<Your API Key>",
5    base_url="https://api.novita.ai/openai"
6)
7
8response = client.chat.completions.create(
9    model="openai/gpt-oss-120b",
10    messages=[
11        {"role": "system", "content": "You are a helpful assistant."},
12        {"role": "user", "content": "Hello, how are you?"}
13    ],
14    max_tokens=32768,
15    temperature=0.7
16)
17
18print(response.choices[0].message.content)

Info

Provider
OpenAI
Quantization
fp4

Supported Functionality

Context Length
131072
Max Output
32768
Serverless
Supported
Function Calling
Supported
Structured Output
Supported
Reasoning
Supported
Input Capabilities
text, image
Output Capabilities
text

Everything you need to build production AI.

200+ models, on-demand GPUs, and secure agent runtimes — unified under one API. Free to start, scales as you grow.