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OpenAI
gpt-oss-120b
Live · US + CAtextApache 2.0
OpenAI's first open-weight model since GPT-2. Runs on a single 80GB GPU and is still a widely used workhorse.
Price per 1M tokens
Input
$0.15
Cached input
$0.015
Output
$0.60
Priced per model · Same in US and CA · Free tier included · Pricing
Specs
- Model id
gpt-oss-120b- Weights released
- Aug 5, 2025
- Parameters
- 117B total · 5.1B active
- Architecture
- MoE
- Context
- 128K tokens (131,072)
- Input
- text
- License
- Apache 2.0
- Regions
- us, ca
- Weights
- openai/gpt-oss-120b ↗
Use it
Three lines of code, or zero.
OpenAI-compatible. Use the model id below, or auto to let the router decide when this model is worth it.
import os
from openai import OpenAI
client = OpenAI(base_url=os.environ["ST_BASE_URL"], api_key=os.environ["ST_API_KEY"])
resp = client.chat.completions.create(
model="gpt-oss-120b",
messages=[{"role": "user", "content": "Hello"}],
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