GPT-OSS 120B
OpenAI's open-weight reasoning model. Many hosts serve it, several of them free and very fast.
OpenAI, reasoning, open weights. Checked 30 October 2026.
Where to use it through an API
- Groq
openai/gpt-oss-120bFree key 
Fireworksaccounts/fireworks/models/gpt-oss-120b
Cerebrasgpt-oss-120b
Hugging Faceopenai/gpt-oss-120b
SambaNovagpt-oss-120bFree key
The maker publishes its own benchmarks and limits on its model page.
How it compares
The models just above and below it on the Artificial Analysis Intelligence Index.
| Model | Index | Context | Speed |
|---|---|---|---|
| GPT-6 Astra | 57 | 1M | 76/s |
| GPT-6.1 Sol | 55 | 1M | 79/s |
| GPT-6.1 Terra | 51 | 1M | 91/s |
| GPT-6 Luna | 28 | 1M | 118/s |
Use GPT-OSS 120B with every other AI at once
Put GPT-OSS 120B in one panel and ChatGPT, Claude, Gemini or any of 300+ models in the others. One message goes to all of them, answers arrive side by side, and test mode times them and hides the names so you judge fairly. Pro is free with a follow on X, and you use your own keys.
Questions
Is there a free GPT-OSS 120B API?
Yes, within limits: Groq, SambaNova give free keys that reach GPT-OSS 120B.
What is the GPT-OSS 120B model id?
Groq: openai/gpt-oss-120b; Fireworks: accounts/fireworks/models/gpt-oss-120b; Cerebras: gpt-oss-120b; Hugging Face: openai/gpt-oss-120b; SambaNova: gpt-oss-120b.
How does GPT-OSS 120B score?
The Artificial Analysis Intelligence Index had not scored it when we checked on 30 October 2026.
Can I use GPT-OSS 120B with ChatGPT, Claude and Gemini at the same time?
Yes. MultiScreenAI puts GPT-OSS 120B in one panel and other models in the others, sends one message to all of them and shows the answers side by side.