OpenAI ChatGPT 5.4 mini, a lighter and cheaper variant of GPT-5.4. Good quality-to-cost ratio for most everyday tasks like drafting, summarization, and moderate reasoning. Pick this over the full 5.4 when pricing or throughput matters more than peak capability. If you need to search the web for information, please turn on the "Web Search" switch. Prompt example 1: Write a short email to my manager asking for a day off next Wednesday for a family matter, noting that a coworker will cover my work. Prompt example 2: Explain in plain words what this line of code does: result = [x * 2 for x in numbers if x > 0] Prompt example 3: Write a friendly reply to this customer question: Are you open on Sundays? Can I bring my pet into the store? Prompt example 4: Translate this into natural Traditional Chinese rather than word for word: Let's touch base next week and see where we land. Prompt example 5: Sum up these three reviews as two pros and two cons: great coffee but cramped seating; friendly staff, too few power outlets; tasty desserts, but long weekend waits. Prompt example 6: What's the difference between a list and a tuple in Python? Give one situation where each fits best. Prompt example 7: Suggest five social media post titles for a handmade dessert shop, warm and cute in style. Prompt example 8: Write a short thank-you message to a coworker for a birthday gift, natural and not too formal. Prompt example 9: (Upload a photo of a menu, jpg) Translate the menu items into English, keeping the original section order. Prompt example 10: Write a message to my landlord saying the bathroom faucet has been leaking for two days, asking him to send a plumber, and listing times that work for me. 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: Medium Fast Mode: uses 2x credits Continuous conversation: Supported AI can make mistakes. Please verify important information.