FW-GPT-OSS-120B
gpt-oss-120b is an open-weight Mixture-of-Experts model from OpenAI with 117B total parameters, designed for powerful reasoning, agentic tasks, and production-grade general-purpose use cases.Fireworks
FireworksVersion: 1
Models available for use with Fireworks on Foundry deliver optimized, best-in-class performance on the Fireworks Inference Cloud. Fireworks on Foundry is a Preview subject to Azure Preview terms and the following supplemental terms: When you use Fireworks on Foundry, data is shared between Microsoft and Fireworks AI, and different compliance and data handling rules will apply. See documentation for details. Customers are responsible for evaluating whether data sharing between Microsoft and Fireworks is appropriate for their organization’s compliance requirements.
About this model
Welcome to the gpt-oss series, OpenAI's open-weight models designed for powerful reasoning, agentic tasks, and versatile developer use cases. gpt-oss-120b is used for production, general purpose, high reasoning use-cases that fits into a single H100 GPU.Key model capabilities
- Complex reasoning and structured problem-solving (especially with chain-of-thought)
- Agentic workflows (tool use, web browsing, function calling)
- Production-grade general-purpose tasks (e.g., coding, math, science)
- Adjustable reasoning levels
Quick facts
Model providerFireworks
TypeChat completion
LifecycleGenerally available (GA)
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Context window131.072k
PricingView pricing