OpenAI gpt-oss 120B

OpenAI gpt-oss 120B is a 120B open-weight language model released under the Apache 2.0 license. It is well-suited for reasoning and function calling use cases. The model is optimized for deployment on consumer hardware.

The 120B model achieves near-parity with OpenAI o4-mini on core reasoning benchmarks, while running on a single 80GB GPU.

Managed API (MaaS) specifications

View model card in Model Garden

Model ID gpt-oss-120b-maas
Launch stage GA
Supported inputs & outputs
  • Inputs:
    Text
  • Outputs:
    Text
Capabilities
Usage types
Versions
  • gpt-oss-120b-maas
    • Launch stage: GA
    • Release date: August 13, 2025
Supported regions

Model availability
  • Global
    • global endpoint
  • United States
    • us-central1

ML processing
  • United States
    • Multi-region
Limits

global endpoint:

  • Max output: 131,072
  • Context length: 131,072

us-central1:

  • Max output: 131,072
  • Context length: 131,072
Pricing See Pricing.

Deploy as a self-deployed model

To self-deploy the model, navigate to the gpt-oss 120B model card in the Model Garden console and click Deploy model. For more information about deploying and using partner models, see Deploy a partner model and make prediction requests.