OpenAI ChatGPT 5.4 nano, the smallest and fastest 5.4-family model. Ideal for tight-loop tools (classification, routing, formatting) and high-volume chat. Ultra-low latency and the lowest per-token price in the family. If you need to search the web for information, please turn on the "Web Search" switch. Prompt example 1: Generate five tags for this product description: waterproof hiking backpack, 30 liters, with chest strap and laptop sleeve. Prompt example 2: Which category is this email subject: admin, meeting, ad or other? Subject: Project status meeting next Tuesday at 10 a.m. Prompt example 3: Translate good morning, thank you and goodbye into Traditional Chinese and Japanese, shown in a table. Prompt example 4: Extract the city or county from each address, one per line: 1 Heping E. Rd., Da'an Dist., Taipei; 2 Zhonghua 5th Rd., Qianzhen Dist., Kaohsiung; 3 Zhongshan Rd., Ji'an, Hualien. Prompt example 5: Format these phone numbers as 0912-345-678: 0912345678, 0933 222 111, 0955-66-77-88. Prompt example 6: Write a headline of up to eight words for this: The city added five parks this year and a 10-km riverside bike path. Prompt example 7: Is this a question, a request or a statement? Reply with the category only: Could you move tomorrow's meeting to another time? Prompt example 8: Expand these abbreviations into their full forms with a short meaning for each: ASAP, FYI, ETA, TBD. Prompt example 9: (Upload an outdoor photo, jpg) Is the weather in this photo sunny, cloudy or rainy? Answer with one word. Prompt example 10: Convert these temperatures from Celsius to Fahrenheit: 0, 25, 37 and 100 degrees. Maximum context window (input and output combined): about 400,000 tokens. Maximum total input per request (including history): 272,000 tokens. Maximum output per reply: about 128,000 tokens (model reasoning, if any, counts toward this limit). Maximum total upload size per request: 512MB (all files and message content combined). Accepted document formats: pdf, docx, xlsx, pptx, txt, csv (file content is provided to the model as extracted text). Accepted image formats: gif, jpeg, jpg, png, webp. Maximum number of images: 1500. Maximum size per image: 50MB. Maximum total image size per message: 384MB (text and history share the same request size limit; uploads close to the limit may still be rejected). Image dimensions: 200 to 8,000 pixels per side. Maximum image resolution: 36,000,000 pixels in total. Output content formats: Text/Image Pricing: Low Continuous conversation: Supported AI can make mistakes. Please verify important information.