GPT OSS 120B
GPT OSS 120B is OpenAI's open-source 120-billion parameter language model, offering strong general-purpose capability with the transparency and flexibility of open weights.
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-oss-120b', prompt: 'Why is the sky blue?'})What To Consider When Choosing a Provider
Zero Data Retention
AI Gateway supports Zero Data Retention for this model via direct gateway requests (BYOK is not included). To configure this, check the documentation.Authentication
AI Gateway authenticates requests using an API key or OIDC token. You do not need to manage provider credentials directly.
GPT OSS 120B ships with open weights, so you can inspect the model, understand its behavior, and deploy it in environments where model transparency is required.
At 120B parameters, this is a substantial model. Through AI Gateway you access it as a managed API without handling infrastructure.
When to Use GPT OSS 120B
Best For
Transparency-required deployments:
Applications where model weights must be inspectable or auditable
Research and experimentation:
Teams studying large language model behavior with full access to architecture
Open-source strategy:
Organizations committed to open-source AI infrastructure
General-purpose tasks:
Chat, content generation, analysis, and coding at a capable model scale
Consider Alternatives When
Maximum proprietary capability:
GPT-5 or GPT-5.2 for higher closed-source capability
Smaller open-source:
Gpt-oss-20b for lighter-weight open-source deployments
Cost optimization:
Smaller models for tasks that don't require 120B parameter scale
Specialized tasks:
Codex models for coding, o-series for reasoning
Conclusion
GPT OSS 120B combines substantial language model capability with the openness of public weights. Available through AI Gateway as a managed API, it serves teams that need both capable AI and model transparency.
FAQ
The model weights are publicly available. You can inspect and audit the model while using it through managed APIs.
GPT-5 is OpenAI's closed-source general-purpose model with higher capability. GPT OSS 120B offers strong general-purpose performance with the advantage of open weights and model transparency.
131.1K tokens, providing substantial capacity for document processing and extended conversations.
AI Gateway accepts a single API key or OIDC token for all requests. You don't embed OpenAI credentials in your application; AI Gateway routes and authenticates on your behalf.
This page shows live throughput and time-to-first-token metrics measured across real AI Gateway traffic.
