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.
OpenAI gpt-oss-120b can be customized with your data to improve responses. Fireworks uses LoRA to efficiently train and deploy your personalized model
Learn MoreImmediately run model on pre-configured GPUs and pay-per-token
Learn MoreOn-demand deployments give you dedicated GPUs for OpenAI gpt-oss-120b using Fireworks' reliable, high-performance system with no rate limits.
Learn Moregpt-oss-120b is an open-weight large language model developed by OpenAI and released on August 5, 2025. It is designed for high-performance reasoning, agentic tasks, and general-purpose applications.
OpenAI
131072
Available
Available
$0.15 / $0.6
