GPT OSS 120B Ultra is a speed-optimized serving variant of gpt-oss-120b, OpenAI's open-weight Mixture-of-Experts language model with 117B total and 5.1B active parameters. The base model takes text input and produces text output with a 128K-token context window, configurable reasoning effort and native tool use.
Modalities
In / out price
$0.20 / $0.95per 1M
Context
131K
Max output
131K
Updated
Oct 22, 2026
Providers
1 routeCompare providers by price, privacy, and speed.
| Anonymous | $0.20 | $0.95 | — | 131K | 131K | — | — |
Privacy
1 / 4Anonymous routing
Anonymous tier
- Anonymous
- Private
- TEE
- E2EE
Your identity is hidden from the inference provider. The inference provider can see prompt content; zero retention is not guaranteed. Learn more
Features
3Streaming
Tool calling
Reasoning
Uptime
FAQ
Common questions about GPT OSS 120B Ultra.