Models / OpenAIGPT-OSS / / gpt-oss-20B API
gpt-oss-20B API

Scalable Open Reasoning:
gpt-oss-20B provides powerful chain-of-thought reasoning in an efficient 20B parameter model. Designed for single-GPU deployment while maintaining sophisticated reasoning capabilities, this Apache 2.0 licensed model offers the perfect balance of performance and resource efficiency for diverse applications.
gpt-oss-20B API Usage
Endpoint
How to use gpt-oss-20B
Model details
Architecture Overview:
• Compact Mixture-of-Experts (MoE) design with SwiGLU activations
• Token-choice MoE optimized for single-GPU efficiency
• Alternating attention mechanism with full and sliding window contexts
• Learned attention sink architecture for memory optimization
Training Methodology:
• Comprehensive safety evaluation and testing protocols
• Global community feedback integration
• Malicious fine-tuning resistance verification
• Standard GPT-4o tokenizer with Harmony format compatibility
Performance Characteristics:
• Native FP4 quantization for optimal inference speed
• Single B200 GPU deployment capability
• 128K context window with efficient memory usage
• Adjustable reasoning effort levels for task-specific optimization
Prompting gpt-oss-20B
Applications & Use Cases
Development Applications:
• Rapid prototyping and development support
• Code generation and optimization
• API design and documentation
• System integration and testing
Business Solutions:
• Customer support automation
• Content generation and editing
• Process automation and workflow optimization
• Market research and analysis
Educational Use Cases:
• Interactive tutoring and learning assistance
• Curriculum development support
• Research methodology guidance
• Academic writing and editing
Deployment Advantages:
• Cost-effective single-GPU operation
• Reduced infrastructure requirements
• Scalable deployment across multiple instances
• Edge computing and distributed processing capabilities