GPT OSS 120B
GPT OSS 120B is OpenAI's powerful open-weight Mixture-of-Experts LLM with 117B parameters, delivering near-parity to o4-mini on reasoning, coding, and agentic tasks while fitting efficiently on a single 80GB GPU. Fine-tune it for custom use cases, tool calling, and secure on-premises deployment under the Apache 2.0 license.
Available for Chat, Vision, and File Uploads.
Performance Benchmarks
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Start a Conversation
Ask anything.
Have a natural conversation, brainstorm ideas, draft emails, or ask for advice.
Use a Persona
Specialized Experts.
Instruct the AI to act as a Coding Tutor, Marketing Expert, or Travel Guide.
Why use GPT OSS 120B?
Advanced Reasoning
Chain-of-thought reasoning with configurable effort (low/medium/high) for complex problem-solving
Agentic Capabilities
Supports tool use via function calling, browsing, and Python code execution
Mixture-of-Experts Architecture
128 experts with efficient routing, activating ~5.1B parameters per token for specialized performance
Capability Examples
How to use
Go to Chat
Navigate to the "AI Chat" page.
Select Model
Ensure GPT OSS 120B is selected.
Type Prompt
Ask a question or paste code.
Interact
Refine the answer by replying to the AI.
Compare LLMs Side-by-Side
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