GPT-5 Nano

Overview

GPT-5 Nano is the most compact model in the GPT-5 lineup. It prioritizes speed, low cost, and predictable performance, making it ideal for simple, high-volume tasks. While it inherits core GPT-5 alignment and instruction-following, it is intentionally optimized for lightweight workloads rather than deep reasoning.

Capabilities

• Ultra-low latency responses for real-time systems
• Cost-optimized throughput for large-scale automation
• Tool and function calling for structured tasks
• Text and image inputs with concise text outputs

Strengths

• Excellent for classification, routing, and lightweight summarization
• Predictable performance for deterministic prompts
• Very low operational cost per request
• Suitable for background processing and batch pipelines

Limitations and Considerations

• Limited depth for complex reasoning or ambiguous prompts
• Not the best fit for creative ideation or multi-step analysis
• Output quality can degrade on highly technical tasks

Best Use Cases

GPT-5 Nano excels at:

• Simple classification and routing tasks
• Quick text transformations
• High-frequency API calls
• Chatbot intent detection
• Basic summarization